diff --git a/LICENSE b/LICENSE
index 261eeb9e9..a98c551ed 100644
--- a/LICENSE
+++ b/LICENSE
@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2020-2025 The HuggingFace Team
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/examples/datasets/hh-rlhf-helpful-base.py b/examples/datasets/hh-rlhf-helpful-base.py
index 98a225c8e..fdb16c3bb 100644
--- a/examples/datasets/hh-rlhf-helpful-base.py
+++ b/examples/datasets/hh-rlhf-helpful-base.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/lm-human-preferences-descriptiveness.py b/examples/datasets/lm-human-preferences-descriptiveness.py
index 7515b7737..e7dbf83a1 100644
--- a/examples/datasets/lm-human-preferences-descriptiveness.py
+++ b/examples/datasets/lm-human-preferences-descriptiveness.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/lm-human-preferences-sentiment.py b/examples/datasets/lm-human-preferences-sentiment.py
index da411742b..fddf483c4 100644
--- a/examples/datasets/lm-human-preferences-sentiment.py
+++ b/examples/datasets/lm-human-preferences-sentiment.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/math_shepherd.py b/examples/datasets/math_shepherd.py
index 47a28f0a3..6eec699ce 100644
--- a/examples/datasets/math_shepherd.py
+++ b/examples/datasets/math_shepherd.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/prm800k.py b/examples/datasets/prm800k.py
index 631fc89d2..2947755a0 100644
--- a/examples/datasets/prm800k.py
+++ b/examples/datasets/prm800k.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/rlaif-v.py b/examples/datasets/rlaif-v.py
index b867d6ed6..093ae98a8 100644
--- a/examples/datasets/rlaif-v.py
+++ b/examples/datasets/rlaif-v.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/tldr.py b/examples/datasets/tldr.py
index 1f1494359..2c905f849 100644
--- a/examples/datasets/tldr.py
+++ b/examples/datasets/tldr.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/tldr_preference.py b/examples/datasets/tldr_preference.py
index 3de9a557a..1ce9db360 100644
--- a/examples/datasets/tldr_preference.py
+++ b/examples/datasets/tldr_preference.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/ultrafeedback-prompt.py b/examples/datasets/ultrafeedback-prompt.py
index 3b49ccc1a..515a4d03d 100644
--- a/examples/datasets/ultrafeedback-prompt.py
+++ b/examples/datasets/ultrafeedback-prompt.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/datasets/ultrafeedback.py b/examples/datasets/ultrafeedback.py
index a7d9a28c2..2b132195f 100644
--- a/examples/datasets/ultrafeedback.py
+++ b/examples/datasets/ultrafeedback.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/layer_skip/scripts/benchmark_layer_skip.py b/examples/research_projects/layer_skip/scripts/benchmark_layer_skip.py
index 7aa74ed4a..9359dda33 100644
--- a/examples/research_projects/layer_skip/scripts/benchmark_layer_skip.py
+++ b/examples/research_projects/layer_skip/scripts/benchmark_layer_skip.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/layer_skip/scripts/config.py b/examples/research_projects/layer_skip/scripts/config.py
index fa255d6dc..2c9870513 100644
--- a/examples/research_projects/layer_skip/scripts/config.py
+++ b/examples/research_projects/layer_skip/scripts/config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/layer_skip/scripts/custom_trainer.py b/examples/research_projects/layer_skip/scripts/custom_trainer.py
index 32099f8a8..8e52b6e23 100644
--- a/examples/research_projects/layer_skip/scripts/custom_trainer.py
+++ b/examples/research_projects/layer_skip/scripts/custom_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/layer_skip/scripts/layer_skip_sft.py b/examples/research_projects/layer_skip/scripts/layer_skip_sft.py
index f443f0661..bddb36b62 100644
--- a/examples/research_projects/layer_skip/scripts/layer_skip_sft.py
+++ b/examples/research_projects/layer_skip/scripts/layer_skip_sft.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/stack_llama/scripts/merge_peft_adapter.py b/examples/research_projects/stack_llama/scripts/merge_peft_adapter.py
index 28a7663be..9c7974ae0 100644
--- a/examples/research_projects/stack_llama/scripts/merge_peft_adapter.py
+++ b/examples/research_projects/stack_llama/scripts/merge_peft_adapter.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/stack_llama/scripts/reward_modeling.py b/examples/research_projects/stack_llama/scripts/reward_modeling.py
index c902df2dc..e45781b66 100644
--- a/examples/research_projects/stack_llama/scripts/reward_modeling.py
+++ b/examples/research_projects/stack_llama/scripts/reward_modeling.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/stack_llama/scripts/rl_training.py b/examples/research_projects/stack_llama/scripts/rl_training.py
index 86ba8a193..430d3c47a 100644
--- a/examples/research_projects/stack_llama/scripts/rl_training.py
+++ b/examples/research_projects/stack_llama/scripts/rl_training.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/stack_llama/scripts/supervised_finetuning.py b/examples/research_projects/stack_llama/scripts/supervised_finetuning.py
index 8ca60fb48..85714ce2c 100644
--- a/examples/research_projects/stack_llama/scripts/supervised_finetuning.py
+++ b/examples/research_projects/stack_llama/scripts/supervised_finetuning.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/stack_llama_2/scripts/dpo_llama2.py b/examples/research_projects/stack_llama_2/scripts/dpo_llama2.py
index 4c789da6a..43f9d35b3 100644
--- a/examples/research_projects/stack_llama_2/scripts/dpo_llama2.py
+++ b/examples/research_projects/stack_llama_2/scripts/dpo_llama2.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/stack_llama_2/scripts/sft_llama2.py b/examples/research_projects/stack_llama_2/scripts/sft_llama2.py
index 1f4611a3e..dff5b169e 100644
--- a/examples/research_projects/stack_llama_2/scripts/sft_llama2.py
+++ b/examples/research_projects/stack_llama_2/scripts/sft_llama2.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/tools/calculator.py b/examples/research_projects/tools/calculator.py
index c9a821dd8..b1bec89a6 100644
--- a/examples/research_projects/tools/calculator.py
+++ b/examples/research_projects/tools/calculator.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/tools/python_interpreter.py b/examples/research_projects/tools/python_interpreter.py
index da001555b..e1fa0aee9 100644
--- a/examples/research_projects/tools/python_interpreter.py
+++ b/examples/research_projects/tools/python_interpreter.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/tools/triviaqa.py b/examples/research_projects/tools/triviaqa.py
index 294284e02..13721d672 100644
--- a/examples/research_projects/tools/triviaqa.py
+++ b/examples/research_projects/tools/triviaqa.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/toxicity/scripts/evaluate-toxicity.py b/examples/research_projects/toxicity/scripts/evaluate-toxicity.py
index a973012d4..6a1913f3d 100644
--- a/examples/research_projects/toxicity/scripts/evaluate-toxicity.py
+++ b/examples/research_projects/toxicity/scripts/evaluate-toxicity.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/research_projects/toxicity/scripts/gpt-j-6b-toxicity.py b/examples/research_projects/toxicity/scripts/gpt-j-6b-toxicity.py
index eed02a895..edab2a669 100644
--- a/examples/research_projects/toxicity/scripts/gpt-j-6b-toxicity.py
+++ b/examples/research_projects/toxicity/scripts/gpt-j-6b-toxicity.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/alignprop.py b/examples/scripts/alignprop.py
index eb78c3e1e..d4772942a 100644
--- a/examples/scripts/alignprop.py
+++ b/examples/scripts/alignprop.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/bco.py b/examples/scripts/bco.py
index 9491b555c..0cffabca8 100644
--- a/examples/scripts/bco.py
+++ b/examples/scripts/bco.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/cpo.py b/examples/scripts/cpo.py
index 2ebb079c8..a90d87597 100644
--- a/examples/scripts/cpo.py
+++ b/examples/scripts/cpo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/ddpo.py b/examples/scripts/ddpo.py
index df9dbb4b8..fec079c95 100644
--- a/examples/scripts/ddpo.py
+++ b/examples/scripts/ddpo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/dpo.py b/examples/scripts/dpo.py
index d648a888e..0cadeb9a7 100644
--- a/examples/scripts/dpo.py
+++ b/examples/scripts/dpo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/dpo_online.py b/examples/scripts/dpo_online.py
index ea4841679..33d5cb182 100644
--- a/examples/scripts/dpo_online.py
+++ b/examples/scripts/dpo_online.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/dpo_vlm.py b/examples/scripts/dpo_vlm.py
index ce0768d36..7ceed86f0 100644
--- a/examples/scripts/dpo_vlm.py
+++ b/examples/scripts/dpo_vlm.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/evals/judge_tldr.py b/examples/scripts/evals/judge_tldr.py
index 1dad5cb57..b26841ae4 100644
--- a/examples/scripts/evals/judge_tldr.py
+++ b/examples/scripts/evals/judge_tldr.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/gkd.py b/examples/scripts/gkd.py
index 8f95f38c6..923603d9d 100644
--- a/examples/scripts/gkd.py
+++ b/examples/scripts/gkd.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/kto.py b/examples/scripts/kto.py
index 5b9047cfd..b88ac3ffe 100644
--- a/examples/scripts/kto.py
+++ b/examples/scripts/kto.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/nash_md.py b/examples/scripts/nash_md.py
index a116e82f7..ff8ea4621 100644
--- a/examples/scripts/nash_md.py
+++ b/examples/scripts/nash_md.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/orpo.py b/examples/scripts/orpo.py
index 33b499e3e..10a567874 100644
--- a/examples/scripts/orpo.py
+++ b/examples/scripts/orpo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/ppo/ppo.py b/examples/scripts/ppo/ppo.py
index 4e05011c6..4374f0baa 100644
--- a/examples/scripts/ppo/ppo.py
+++ b/examples/scripts/ppo/ppo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/ppo/ppo_tldr.py b/examples/scripts/ppo/ppo_tldr.py
index 502e553b8..03cc2e20a 100644
--- a/examples/scripts/ppo/ppo_tldr.py
+++ b/examples/scripts/ppo/ppo_tldr.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/prm.py b/examples/scripts/prm.py
index df3ab1702..86ce316c1 100644
--- a/examples/scripts/prm.py
+++ b/examples/scripts/prm.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/reward_modeling.py b/examples/scripts/reward_modeling.py
index 902baf6f9..14ca8367f 100644
--- a/examples/scripts/reward_modeling.py
+++ b/examples/scripts/reward_modeling.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/rloo/rloo.py b/examples/scripts/rloo/rloo.py
index debbaee1b..fdb5527cf 100644
--- a/examples/scripts/rloo/rloo.py
+++ b/examples/scripts/rloo/rloo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/rloo/rloo_tldr.py b/examples/scripts/rloo/rloo_tldr.py
index a7e72e959..0c3cbabfe 100644
--- a/examples/scripts/rloo/rloo_tldr.py
+++ b/examples/scripts/rloo/rloo_tldr.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/sft.py b/examples/scripts/sft.py
index 4747e11c4..3a6e26c4b 100644
--- a/examples/scripts/sft.py
+++ b/examples/scripts/sft.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/sft_gemma3.py b/examples/scripts/sft_gemma3.py
index 79649e18b..c19e2095a 100644
--- a/examples/scripts/sft_gemma3.py
+++ b/examples/scripts/sft_gemma3.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/sft_video_llm.py b/examples/scripts/sft_video_llm.py
index aeb79433e..ca46ae64b 100644
--- a/examples/scripts/sft_video_llm.py
+++ b/examples/scripts/sft_video_llm.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/sft_vlm.py b/examples/scripts/sft_vlm.py
index c4dd1554e..ba154c653 100644
--- a/examples/scripts/sft_vlm.py
+++ b/examples/scripts/sft_vlm.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/sft_vlm_gemma3.py b/examples/scripts/sft_vlm_gemma3.py
index fe684c2f5..4470dfd39 100644
--- a/examples/scripts/sft_vlm_gemma3.py
+++ b/examples/scripts/sft_vlm_gemma3.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/sft_vlm_smol_vlm.py b/examples/scripts/sft_vlm_smol_vlm.py
index 16d6ca0d8..6ad5884d5 100644
--- a/examples/scripts/sft_vlm_smol_vlm.py
+++ b/examples/scripts/sft_vlm_smol_vlm.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/examples/scripts/xpo.py b/examples/scripts/xpo.py
index 1a1776ee9..0dbd13e99 100644
--- a/examples/scripts/xpo.py
+++ b/examples/scripts/xpo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/scripts/add_copyrights.py b/scripts/add_copyrights.py
index 91c17db7c..29466f503 100644
--- a/scripts/add_copyrights.py
+++ b/scripts/add_copyrights.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,7 +18,7 @@ import sys
 from datetime import datetime
 
 
-COPYRIGHT_HEADER = f"""# Copyright {datetime.now().year} The HuggingFace Team. All rights reserved.
+COPYRIGHT_HEADER = f"""# Copyright 2020-{datetime.now().year} The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/scripts/generate_tiny_models.py b/scripts/generate_tiny_models.py
index 4e667aea0..ea3b2df42 100644
--- a/scripts/generate_tiny_models.py
+++ b/scripts/generate_tiny_models.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/scripts/generate_zen_dataset.py b/scripts/generate_zen_dataset.py
index c5c140d4a..730643e4c 100644
--- a/scripts/generate_zen_dataset.py
+++ b/scripts/generate_zen_dataset.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/scripts/log_example_reports.py b/scripts/log_example_reports.py
index cc5bb5647..843a64c20 100644
--- a/scripts/log_example_reports.py
+++ b/scripts/log_example_reports.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/scripts/log_reports.py b/scripts/log_reports.py
index dec0d30da..81ec4f236 100644
--- a/scripts/log_reports.py
+++ b/scripts/log_reports.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/setup.py b/setup.py
index 4e52a230d..016052366 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/__init__.py b/tests/__init__.py
index 8568c82be..a31701857 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/slow/__init__.py b/tests/slow/__init__.py
index 8568c82be..a31701857 100644
--- a/tests/slow/__init__.py
+++ b/tests/slow/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/slow/test_dpo_slow.py b/tests/slow/test_dpo_slow.py
index 9026e4528..e5e465e70 100644
--- a/tests/slow/test_dpo_slow.py
+++ b/tests/slow/test_dpo_slow.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/slow/test_grpo_slow.py b/tests/slow/test_grpo_slow.py
index cdadac0d5..1dfb05d24 100644
--- a/tests/slow/test_grpo_slow.py
+++ b/tests/slow/test_grpo_slow.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/slow/test_sft_slow.py b/tests/slow/test_sft_slow.py
index 59ab30f8f..65b5b651b 100644
--- a/tests/slow/test_sft_slow.py
+++ b/tests/slow/test_sft_slow.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/slow/testing_constants.py b/tests/slow/testing_constants.py
index 4c0dc3bf1..1dc30320c 100644
--- a/tests/slow/testing_constants.py
+++ b/tests/slow/testing_constants.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_alignprop_trainer.py b/tests/test_alignprop_trainer.py
index efbc26054..6b9df643b 100644
--- a/tests/test_alignprop_trainer.py
+++ b/tests/test_alignprop_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_bco_trainer.py b/tests/test_bco_trainer.py
index 687a41390..a2a625d1e 100644
--- a/tests/test_bco_trainer.py
+++ b/tests/test_bco_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_best_of_n_sampler.py b/tests/test_best_of_n_sampler.py
index 67a5dd74c..59ff41865 100644
--- a/tests/test_best_of_n_sampler.py
+++ b/tests/test_best_of_n_sampler.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_callbacks.py b/tests/test_callbacks.py
index cce81bb65..7318793a0 100644
--- a/tests/test_callbacks.py
+++ b/tests/test_callbacks.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 6b00ed1ed..28ef6d2b5 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_cli_utils.py b/tests/test_cli_utils.py
index 920d3c036..aab1105a6 100644
--- a/tests/test_cli_utils.py
+++ b/tests/test_cli_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_collators.py b/tests/test_collators.py
index 279ceab58..a55265f87 100644
--- a/tests/test_collators.py
+++ b/tests/test_collators.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_core.py b/tests/test_core.py
index 4be081091..959ea2396 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_cpo_trainer.py b/tests/test_cpo_trainer.py
index 918b2ef32..226fb5004 100644
--- a/tests/test_cpo_trainer.py
+++ b/tests/test_cpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_data_collator_completion_only.py b/tests/test_data_collator_completion_only.py
index 661a1dcf8..260bcfe93 100644
--- a/tests/test_data_collator_completion_only.py
+++ b/tests/test_data_collator_completion_only.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_data_utils.py b/tests/test_data_utils.py
index 1d7c92c63..2046f1730 100644
--- a/tests/test_data_utils.py
+++ b/tests/test_data_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_dataset_formatting.py b/tests/test_dataset_formatting.py
index ae529446f..05397f092 100644
--- a/tests/test_dataset_formatting.py
+++ b/tests/test_dataset_formatting.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_ddpo_trainer.py b/tests/test_ddpo_trainer.py
index 9c0f94066..5c471093f 100644
--- a/tests/test_ddpo_trainer.py
+++ b/tests/test_ddpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_dpo_trainer.py b/tests/test_dpo_trainer.py
index 496cda0d8..044429d20 100644
--- a/tests/test_dpo_trainer.py
+++ b/tests/test_dpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_environments.py b/tests/test_environments.py
index e4b2cd52a..6ec6107ef 100644
--- a/tests/test_environments.py
+++ b/tests/test_environments.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_gkd_trainer.py b/tests/test_gkd_trainer.py
index ae2d15419..98de9e0fd 100644
--- a/tests/test_gkd_trainer.py
+++ b/tests/test_gkd_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_grpo_trainer.py b/tests/test_grpo_trainer.py
index f02c7bba4..66604cc9a 100644
--- a/tests/test_grpo_trainer.py
+++ b/tests/test_grpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_iterative_sft_trainer.py b/tests/test_iterative_sft_trainer.py
index 409a89014..c79f04cf2 100644
--- a/tests/test_iterative_sft_trainer.py
+++ b/tests/test_iterative_sft_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_judges.py b/tests/test_judges.py
index 26086a0a4..4849e22de 100644
--- a/tests/test_judges.py
+++ b/tests/test_judges.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_kto_trainer.py b/tests/test_kto_trainer.py
index 2243a3649..140467fc8 100644
--- a/tests/test_kto_trainer.py
+++ b/tests/test_kto_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_modeling_geometric_mixture_wrapper.py b/tests/test_modeling_geometric_mixture_wrapper.py
index 2c126e59b..abfcdd634 100644
--- a/tests/test_modeling_geometric_mixture_wrapper.py
+++ b/tests/test_modeling_geometric_mixture_wrapper.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_modeling_value_head.py b/tests/test_modeling_value_head.py
index f0f8c8de1..18f775a0c 100644
--- a/tests/test_modeling_value_head.py
+++ b/tests/test_modeling_value_head.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_nash_md_trainer.py b/tests/test_nash_md_trainer.py
index 35ddedb91..b232d4f6e 100644
--- a/tests/test_nash_md_trainer.py
+++ b/tests/test_nash_md_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_online_dpo_trainer.py b/tests/test_online_dpo_trainer.py
index d39605f4f..0d3a64326 100644
--- a/tests/test_online_dpo_trainer.py
+++ b/tests/test_online_dpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_orpo_trainer.py b/tests/test_orpo_trainer.py
index aa5b245db..754974b4b 100644
--- a/tests/test_orpo_trainer.py
+++ b/tests/test_orpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_peft_models.py b/tests/test_peft_models.py
index 240fc03e7..230a75792 100644
--- a/tests/test_peft_models.py
+++ b/tests/test_peft_models.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_ppo_trainer.py b/tests/test_ppo_trainer.py
index 7e19662b7..3f664de1b 100644
--- a/tests/test_ppo_trainer.py
+++ b/tests/test_ppo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_prm_trainer.py b/tests/test_prm_trainer.py
index 1c23a055f..a826a8a1d 100644
--- a/tests/test_prm_trainer.py
+++ b/tests/test_prm_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_reward_trainer.py b/tests/test_reward_trainer.py
index 51ea1183f..046363fdd 100644
--- a/tests/test_reward_trainer.py
+++ b/tests/test_reward_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_rich_progress_callback.py b/tests/test_rich_progress_callback.py
index 578cba29b..af13f2736 100644
--- a/tests/test_rich_progress_callback.py
+++ b/tests/test_rich_progress_callback.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_rloo_trainer.py b/tests/test_rloo_trainer.py
index dcafe7829..f267a1cd4 100644
--- a/tests/test_rloo_trainer.py
+++ b/tests/test_rloo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_sft_trainer.py b/tests/test_sft_trainer.py
index c0ef799ee..2f887efbd 100644
--- a/tests/test_sft_trainer.py
+++ b/tests/test_sft_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_trainers_args.py b/tests/test_trainers_args.py
index 406eba4f8..a22b8b851 100644
--- a/tests/test_trainers_args.py
+++ b/tests/test_trainers_args.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_utils.py b/tests/test_utils.py
index bdae720b6..3b037f297 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/test_xpo_trainer.py b/tests/test_xpo_trainer.py
index 157929d17..b953bd008 100644
--- a/tests/test_xpo_trainer.py
+++ b/tests/test_xpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/testing_constants.py b/tests/testing_constants.py
index 7cb3c22a5..a4c6755c5 100644
--- a/tests/testing_constants.py
+++ b/tests/testing_constants.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/tests/testing_utils.py b/tests/testing_utils.py
index adb891799..1de580d73 100644
--- a/tests/testing_utils.py
+++ b/tests/testing_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/__init__.py b/trl/__init__.py
index 262feb4da..1a6b4c1de 100644
--- a/trl/__init__.py
+++ b/trl/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/cli.py b/trl/cli.py
index 5eea3b86e..05dc116fa 100644
--- a/trl/cli.py
+++ b/trl/cli.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/core.py b/trl/core.py
index b12d3a79d..bd8733bed 100644
--- a/trl/core.py
+++ b/trl/core.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/data_utils.py b/trl/data_utils.py
index 9239cf84e..2612ab278 100644
--- a/trl/data_utils.py
+++ b/trl/data_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/environment/__init__.py b/trl/environment/__init__.py
index 0ab3e0d62..70ab98f67 100644
--- a/trl/environment/__init__.py
+++ b/trl/environment/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/environment/base_environment.py b/trl/environment/base_environment.py
index bf54128e9..fbc5ddec1 100644
--- a/trl/environment/base_environment.py
+++ b/trl/environment/base_environment.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/extras/__init__.py b/trl/extras/__init__.py
index bd438b555..fddcdf1af 100644
--- a/trl/extras/__init__.py
+++ b/trl/extras/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/extras/best_of_n_sampler.py b/trl/extras/best_of_n_sampler.py
index 6463bc614..d51323b5a 100644
--- a/trl/extras/best_of_n_sampler.py
+++ b/trl/extras/best_of_n_sampler.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/extras/dataset_formatting.py b/trl/extras/dataset_formatting.py
index 0dabca005..f648976e3 100644
--- a/trl/extras/dataset_formatting.py
+++ b/trl/extras/dataset_formatting.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/extras/profiling.py b/trl/extras/profiling.py
index 95d6a8091..4f265fec0 100644
--- a/trl/extras/profiling.py
+++ b/trl/extras/profiling.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/extras/vllm_client.py b/trl/extras/vllm_client.py
index 307ed8c9d..19160ae95 100644
--- a/trl/extras/vllm_client.py
+++ b/trl/extras/vllm_client.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/import_utils.py b/trl/import_utils.py
index 978dd6d9e..e171ffdd7 100644
--- a/trl/import_utils.py
+++ b/trl/import_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/mergekit_utils.py b/trl/mergekit_utils.py
index 0f8e34804..ed60e6dc6 100644
--- a/trl/mergekit_utils.py
+++ b/trl/mergekit_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/models/__init__.py b/trl/models/__init__.py
index 6abefbaf5..449a39bad 100644
--- a/trl/models/__init__.py
+++ b/trl/models/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/models/auxiliary_modules.py b/trl/models/auxiliary_modules.py
index cffd35457..2a119363f 100644
--- a/trl/models/auxiliary_modules.py
+++ b/trl/models/auxiliary_modules.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/models/modeling_base.py b/trl/models/modeling_base.py
index b30275805..b5f083b84 100644
--- a/trl/models/modeling_base.py
+++ b/trl/models/modeling_base.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/models/modeling_sd_base.py b/trl/models/modeling_sd_base.py
index 8eda272f9..82a951935 100644
--- a/trl/models/modeling_sd_base.py
+++ b/trl/models/modeling_sd_base.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/models/modeling_value_head.py b/trl/models/modeling_value_head.py
index d63111675..e5cd18d2b 100644
--- a/trl/models/modeling_value_head.py
+++ b/trl/models/modeling_value_head.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/models/sd_utils.py b/trl/models/sd_utils.py
index 1c288293d..05501d54a 100644
--- a/trl/models/sd_utils.py
+++ b/trl/models/sd_utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/models/utils.py b/trl/models/utils.py
index f71934993..c93e2f9e9 100644
--- a/trl/models/utils.py
+++ b/trl/models/utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/__init__.py b/trl/scripts/__init__.py
index e4873daae..272a717db 100644
--- a/trl/scripts/__init__.py
+++ b/trl/scripts/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/chat.py b/trl/scripts/chat.py
index 0ceff0478..1ba9a8f59 100644
--- a/trl/scripts/chat.py
+++ b/trl/scripts/chat.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/dpo.py b/trl/scripts/dpo.py
index 1e736e15e..6668b44e1 100644
--- a/trl/scripts/dpo.py
+++ b/trl/scripts/dpo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/env.py b/trl/scripts/env.py
index 4aae98d20..202e96a6c 100644
--- a/trl/scripts/env.py
+++ b/trl/scripts/env.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/grpo.py b/trl/scripts/grpo.py
index 4b336b28e..87a62a9aa 100644
--- a/trl/scripts/grpo.py
+++ b/trl/scripts/grpo.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/kto.py b/trl/scripts/kto.py
index c1a019ab6..3ef7e4c7f 100644
--- a/trl/scripts/kto.py
+++ b/trl/scripts/kto.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/sft.py b/trl/scripts/sft.py
index 6700dbb8e..0b748740c 100644
--- a/trl/scripts/sft.py
+++ b/trl/scripts/sft.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/utils.py b/trl/scripts/utils.py
index c55a0187b..fff6de06a 100644
--- a/trl/scripts/utils.py
+++ b/trl/scripts/utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/scripts/vllm_serve.py b/trl/scripts/vllm_serve.py
index 6fe67ea07..be95eb087 100644
--- a/trl/scripts/vllm_serve.py
+++ b/trl/scripts/vllm_serve.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/__init__.py b/trl/trainer/__init__.py
index 85968218c..ebe1c9f39 100644
--- a/trl/trainer/__init__.py
+++ b/trl/trainer/__init__.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/alignprop_config.py b/trl/trainer/alignprop_config.py
index fed69d4d1..6eef04df1 100644
--- a/trl/trainer/alignprop_config.py
+++ b/trl/trainer/alignprop_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/alignprop_trainer.py b/trl/trainer/alignprop_trainer.py
index 80c9e0556..6dfdc1366 100644
--- a/trl/trainer/alignprop_trainer.py
+++ b/trl/trainer/alignprop_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/bco_config.py b/trl/trainer/bco_config.py
index d6162915d..9261c8331 100644
--- a/trl/trainer/bco_config.py
+++ b/trl/trainer/bco_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/bco_trainer.py b/trl/trainer/bco_trainer.py
index f93e5b480..530cb4bb7 100644
--- a/trl/trainer/bco_trainer.py
+++ b/trl/trainer/bco_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/callbacks.py b/trl/trainer/callbacks.py
index 1c83bbe76..3be189dff 100644
--- a/trl/trainer/callbacks.py
+++ b/trl/trainer/callbacks.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/cpo_config.py b/trl/trainer/cpo_config.py
index 34099cfce..24b483fb3 100644
--- a/trl/trainer/cpo_config.py
+++ b/trl/trainer/cpo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/cpo_trainer.py b/trl/trainer/cpo_trainer.py
index af00e562e..76644d8a8 100644
--- a/trl/trainer/cpo_trainer.py
+++ b/trl/trainer/cpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/ddpo_config.py b/trl/trainer/ddpo_config.py
index 4f86b8d40..5852e8582 100644
--- a/trl/trainer/ddpo_config.py
+++ b/trl/trainer/ddpo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/ddpo_trainer.py b/trl/trainer/ddpo_trainer.py
index 0ba0c7b64..6e02ed72a 100644
--- a/trl/trainer/ddpo_trainer.py
+++ b/trl/trainer/ddpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/dpo_config.py b/trl/trainer/dpo_config.py
index 6c2cd8d88..94bff43fb 100644
--- a/trl/trainer/dpo_config.py
+++ b/trl/trainer/dpo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/dpo_trainer.py b/trl/trainer/dpo_trainer.py
index c8bfac2a6..d2b4d39cb 100644
--- a/trl/trainer/dpo_trainer.py
+++ b/trl/trainer/dpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/gkd_config.py b/trl/trainer/gkd_config.py
index 1a962bfd9..ac26a7434 100644
--- a/trl/trainer/gkd_config.py
+++ b/trl/trainer/gkd_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/gkd_trainer.py b/trl/trainer/gkd_trainer.py
index a644829ba..0c28630b5 100644
--- a/trl/trainer/gkd_trainer.py
+++ b/trl/trainer/gkd_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/grpo_config.py b/trl/trainer/grpo_config.py
index dc77f5da1..5c53924ce 100644
--- a/trl/trainer/grpo_config.py
+++ b/trl/trainer/grpo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/grpo_trainer.py b/trl/trainer/grpo_trainer.py
index 4ce2a9bce..9cda96254 100644
--- a/trl/trainer/grpo_trainer.py
+++ b/trl/trainer/grpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/iterative_sft_trainer.py b/trl/trainer/iterative_sft_trainer.py
index 369348a78..8ad292a51 100644
--- a/trl/trainer/iterative_sft_trainer.py
+++ b/trl/trainer/iterative_sft_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/judges.py b/trl/trainer/judges.py
index 9c9e81461..852fa06f6 100644
--- a/trl/trainer/judges.py
+++ b/trl/trainer/judges.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/kto_config.py b/trl/trainer/kto_config.py
index 111d0e5b1..7a8a8abda 100644
--- a/trl/trainer/kto_config.py
+++ b/trl/trainer/kto_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/kto_trainer.py b/trl/trainer/kto_trainer.py
index 050251709..0c582c19d 100644
--- a/trl/trainer/kto_trainer.py
+++ b/trl/trainer/kto_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/model_config.py b/trl/trainer/model_config.py
index c0df47254..935bd7352 100644
--- a/trl/trainer/model_config.py
+++ b/trl/trainer/model_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/nash_md_config.py b/trl/trainer/nash_md_config.py
index 243ad2851..07d8152f4 100644
--- a/trl/trainer/nash_md_config.py
+++ b/trl/trainer/nash_md_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/nash_md_trainer.py b/trl/trainer/nash_md_trainer.py
index 5d2a8e830..ed94df097 100644
--- a/trl/trainer/nash_md_trainer.py
+++ b/trl/trainer/nash_md_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/online_dpo_config.py b/trl/trainer/online_dpo_config.py
index 93c11bec4..a8ce8150a 100644
--- a/trl/trainer/online_dpo_config.py
+++ b/trl/trainer/online_dpo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/online_dpo_trainer.py b/trl/trainer/online_dpo_trainer.py
index 22c21fac9..3d206566a 100644
--- a/trl/trainer/online_dpo_trainer.py
+++ b/trl/trainer/online_dpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/orpo_config.py b/trl/trainer/orpo_config.py
index 96fe5b293..811992fe0 100644
--- a/trl/trainer/orpo_config.py
+++ b/trl/trainer/orpo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/orpo_trainer.py b/trl/trainer/orpo_trainer.py
index 755613832..0548ef724 100644
--- a/trl/trainer/orpo_trainer.py
+++ b/trl/trainer/orpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/ppo_config.py b/trl/trainer/ppo_config.py
index 99030592b..8f23084ce 100644
--- a/trl/trainer/ppo_config.py
+++ b/trl/trainer/ppo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/ppo_trainer.py b/trl/trainer/ppo_trainer.py
index e9e8386e9..54b62394a 100644
--- a/trl/trainer/ppo_trainer.py
+++ b/trl/trainer/ppo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/prm_config.py b/trl/trainer/prm_config.py
index ddff85485..949ab1af2 100644
--- a/trl/trainer/prm_config.py
+++ b/trl/trainer/prm_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/prm_trainer.py b/trl/trainer/prm_trainer.py
index b12401af7..70e870af5 100644
--- a/trl/trainer/prm_trainer.py
+++ b/trl/trainer/prm_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/reward_config.py b/trl/trainer/reward_config.py
index f324637e5..bdc6ad6f3 100644
--- a/trl/trainer/reward_config.py
+++ b/trl/trainer/reward_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/reward_trainer.py b/trl/trainer/reward_trainer.py
index 625b8f49b..07441d6f5 100644
--- a/trl/trainer/reward_trainer.py
+++ b/trl/trainer/reward_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/rloo_config.py b/trl/trainer/rloo_config.py
index bd0b6ed8e..b7c831445 100644
--- a/trl/trainer/rloo_config.py
+++ b/trl/trainer/rloo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/rloo_trainer.py b/trl/trainer/rloo_trainer.py
index 344253c2b..0f0924206 100644
--- a/trl/trainer/rloo_trainer.py
+++ b/trl/trainer/rloo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/sft_config.py b/trl/trainer/sft_config.py
index 566495025..60c9aadae 100644
--- a/trl/trainer/sft_config.py
+++ b/trl/trainer/sft_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/sft_trainer.py b/trl/trainer/sft_trainer.py
index 59dd02283..8ec1fa870 100644
--- a/trl/trainer/sft_trainer.py
+++ b/trl/trainer/sft_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -353,8 +353,8 @@ class SFTTrainer(Trainer):
                 f"a `torch.dtype` (e.g., 'float32'), but got {torch_dtype}."
             )
         # Disable caching if gradient checkpointing is enabled (not supported)
-        if args.gradient_checkpointing:
-            model_init_kwargs["use_cache"] = False
+        # if args.gradient_checkpointing:
+        #     model_init_kwargs["use_cache"] = False
 
         # Create model
         model = AutoModelForCausalLM.from_pretrained(model_path, **model_init_kwargs)
diff --git a/trl/trainer/utils.py b/trl/trainer/utils.py
index 2f09b7ef4..2cba96fe2 100644
--- a/trl/trainer/utils.py
+++ b/trl/trainer/utils.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/xpo_config.py b/trl/trainer/xpo_config.py
index 717c11ce1..78c1e5621 100644
--- a/trl/trainer/xpo_config.py
+++ b/trl/trainer/xpo_config.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/trl/trainer/xpo_trainer.py b/trl/trainer/xpo_trainer.py
index 6c7579ae8..7b6056be4 100644
--- a/trl/trainer/xpo_trainer.py
+++ b/trl/trainer/xpo_trainer.py
@@ -1,4 +1,4 @@
-# Copyright 2025 The HuggingFace Team. All rights reserved.
+# Copyright 2020-2025 The HuggingFace Team. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.