compat: Update forward compatibility horizon to 2021-09-22

PiperOrigin-RevId: 398186076
Change-Id: I672ddac2a379bc3d0e18e174d64f60b2eb6d4133
diff --git a/tensorflow/python/compat/compat.py b/tensorflow/python/compat/compat.py
index 2aeca94..e4c56da 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(2021, 9, 21)
+_FORWARD_COMPATIBILITY_HORIZON = datetime.date(2021, 9, 22)
 _FORWARD_COMPATIBILITY_DELTA_DAYS_VAR_NAME = "TF_FORWARD_COMPATIBILITY_DELTA_DAYS"
 _FORWARD_COMPATIBILITY_DATE_NUMBER = None