diff --git a/CHANGES b/CHANGES
index e20909f83..84271a1fa 100644
--- a/CHANGES
+++ b/CHANGES
@@ -6,6 +6,12 @@ Features added
 
 * Builders: rebuild i18n target document when catalog updated.
 
+Incompatible changes
+--------------------
+
+* PR#144, #1182: Force timezone offset to UTC on POT-Creation-Date that was
+  generated by gettext builder. Thanks to  masklinn.
+
 Bugs fixed
 ----------
 
diff --git a/sphinx/builders/gettext.py b/sphinx/builders/gettext.py
index f45d7b4d8..d9276cbc3 100644
--- a/sphinx/builders/gettext.py
+++ b/sphinx/builders/gettext.py
@@ -108,7 +108,6 @@ class I18nBuilder(Builder):
 
 
 ZERO = timedelta(0)
-HOUR = timedelta(hours=1)
 
 class UTC(tzinfo):
     """UTC"""