diff --git a/acme.sh b/acme.sh
index d3d46b5..0b23495 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1265,6 +1265,10 @@ _time() {
   date -u "+%s"
 }
 
+_utc_date() {
+  date -u "+%Y-%m-%d %H:%M:%S"
+}
+
 _mktemp() {
   if _exists mktemp; then
     if mktemp 2>/dev/null; then