@@ -70,7 +70,11 @@ if command -v git &> /dev/null && git rev-parse &> /dev/null; then

 	if [ -n "$(git status --porcelain --untracked-files=no)" ]; then

 		GITCOMMIT="$GITCOMMIT-dirty"

 	fi

-	BUILDTIME=$(date --rfc-3339 ns | sed -e 's/ /T/')

+	! BUILDTIME=$(date --rfc-3339 ns | sed -e 's/ /T/') &> /dev/null

+	if [ -z $BUILDTIME ]; then

+		# If using bash 3.1 which doesn't support --rfc-3389, eg Windows CI

+		BUILDTIME=$(date -u)

+	fi

 elif [ "$DOCKER_GITCOMMIT" ]; then

 	GITCOMMIT="$DOCKER_GITCOMMIT"

 else