diff --git a/gen-pkg-spec.sh b/gen-pkg-spec.sh
index 83e9d1129f4c5b8df552e3656cb9961b1f603d30..2d3c99f9adcc88a940626357ff603726a81ba137 100755
--- a/gen-pkg-spec.sh
+++ b/gen-pkg-spec.sh
@@ -200,7 +200,7 @@ modify_spec()
 
         debug_log "gen changelog"
         maintainer=`grep maintainer: ${ROS_DEPS_BASE}/$pkg-PackageXml | awk -F"maintainer:" '{print $2}'`
-        changetime=`date +"%a %b %d %Y"`
+        changetime=`LC_TIME=en_US.UTF-8 date +"%a %b %d %Y"`
         #changetime="Thu May 04 2023"
         changelog="$changetime $maintainer - $base_version-$release_version"
         sed -i "s#ROS_PACKAGE_CHANGELOG#$changelog#g" $spec