'use strict';
function nightlyMarker() {
	// get current client local time 
	// convert the local time to the "Europe/Berlin" timezone and get the hours
	// the Daylight Saving Time is also cared
	var startTime = 2; //am 
	var currentHours = new moment().tz("Europe/Berlin").hours();
	// if now is between 2am and 3am it should be displayed as block otherwise it should be hided
	var displayProperty = (currentHours === startTime) ? "block" : "none";
	// attach the displayProperty to the nightlyMarker 
	document.getElementById('nightlyMarker').style.display = displayProperty;
	// call back this function after 1s
	setTimeout(nightlyMarker, 1000);
}