diff --git a/changelog2spec b/changelog2spec
index 863ec18a..539577a5 100755
--- a/changelog2spec
+++ b/changelog2spec
@@ -33,6 +33,7 @@ use Time::Zone;
 
 use strict;
 
+$ENV{TZ} = "UTC";
 my @wday = qw{Sun Mon Tue Wed Thu Fri Sat};
 my @mon = qw{Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec};