compat: Update forward compatibility horizon to 2020-06-21

PiperOrigin-RevId: 317522319
Change-Id: Id26ff638f85872a3615fe2fe71e8cf0fced872ed
diff --git a/tensorflow/python/compat/compat.py b/tensorflow/python/compat/compat.py
index ba6e375..3f622ef 100644
--- a/tensorflow/python/compat/compat.py
+++ b/tensorflow/python/compat/compat.py
@@ -33,7 +33,7 @@
 # This value changes every day with an automatic CL. It can be modified in code
 # via `forward_compatibility_horizon()` or with the environment variable
 # TF_FORWARD_COMPATIBILITY_DELTA_DAYS, which is added to the compatibility date.
-_FORWARD_COMPATIBILITY_HORIZON = datetime.date(2020, 6, 20)
+_FORWARD_COMPATIBILITY_HORIZON = datetime.date(2020, 6, 21)
 _FORWARD_COMPATIBILITY_DELTA_DAYS_VAR_NAME = "TF_FORWARD_COMPATIBILITY_DELTA_DAYS"
 _FORWARD_COMPATIBILITY_DATE_NUMBER = None