compat: Update forward compatibility horizon to 2019-09-24

PiperOrigin-RevId: 270859006
diff --git a/tensorflow/python/compat/compat.py b/tensorflow/python/compat/compat.py
index b1b09e3..8f1e8ee 100644
--- a/tensorflow/python/compat/compat.py
+++ b/tensorflow/python/compat/compat.py
@@ -31,7 +31,7 @@
 # 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(2019, 9, 23)
+_FORWARD_COMPATIBILITY_HORIZON = datetime.date(2019, 9, 24)
 _FORWARD_COMPATIBILITY_DELTA_DAYS_VAR_NAME = "TF_FORWARD_COMPATIBILITY_DELTA_DAYS"
 _FORWARD_COMPATIBILITY_DATE_NUMBER = None