Fixtestcase calendar testcase failure (#3596)

fix calendar testcase failing after date change (exposes helper failure)

tests/configs/modules/calendar/show-duplicates-in-calendar.js

@@ -27,6 +27,10 @@ let config = {
 	]
 };
 
+Date.now = () => {
+	return new Date("15 Sep 2024 12:30:00 GMT").valueOf();
+};
+
 /*************** DO NOT EDIT THE LINE BELOW ***************/
 if (typeof module !== "undefined") {
 	module.exports = config;