Date and time function not working correctly in prod

when I test in the lense studio app its ok but when i send to phone or to lens its not firing

current utc is 2018-03-03 04:00:00.000z

var datenow = new Date(Date.now()).toUTCString();
var countto = "2018-03-03 19:00:00.000Z";


var touchStartPos;

var event = script.createEvent("TouchStartEvent");
event.bind(function(eventData){
 touchStartPos = eventData.getTouchPosition();
});

var event = script.createEvent("TouchEndEvent"); 
event.bind(function(eventData){
 if (touchStartPos) {
   var currentPos = eventData.getTouchPosition();
   var posChange = new vec2(currentPos.x - touchStartPos.x, currentPos.y - touchStartPos.y);

   if (posChange.y < 0 && datenow > countto) {
    reveal();
  } else if (posChange.y < 0 && datenow < countto)
  {
    denied();
  }

}
});