diff --git a/dev/release.sh b/dev/release.sh
index bb2728e14f..cf184c309c 100755
--- a/dev/release.sh
+++ b/dev/release.sh
@@ -9,6 +9,10 @@
 # This is the most shell agnostic way to specify that POSIX rules.
 POSIXLY_CORRECT=1
 
+# Force C locale because some commands (like date +%b) relies
+# on the current locale.
+export LC_ALL=C
+
 usage () {
     cat <<EOF
 Usage: release.sh [ options ... ]