diff --git a/templates/adding_a_new_model/open_model_proposals/ADD_BIG_BIRD.md b/templates/adding_a_new_model/open_model_proposals/ADD_BIG_BIRD.md
index ddb1cdfcea..2c6383c6c8 100644
--- a/templates/adding_a_new_model/open_model_proposals/ADD_BIG_BIRD.md
+++ b/templates/adding_a_new_model/open_model_proposals/ADD_BIG_BIRD.md
@@ -3,9 +3,9 @@ How to add BigBird to 🤗 Transformers?
 
 Mentor: [Patrick](https://github.com/patrickvonplaten)
 
-Begin: 15.02.2020
+Begin: 19.02.2020
 
-Estimated End: 12.03.2020
+Estimated End: 19.03.2020
 
 Adding a new model is often difficult and requires an in-depth knowledge
 of the 🤗 Transformers library and ideally also of the model's original