var nowdate;
var d = new Date();
nowdate = ('0' + d.getDate()).slice(-2) + "-" + ('0' + (d.getMonth() + 1)).slice(-2) + "-" + d.getFullYear()  + " " + ('0' + d.getHours()).slice(-2) + ":" + ('0' + d.getMinutes()).slice(-2);

if(nowdate < startdate){
  console.log("Start date is greater than now date");
} else {
  console.log("Start date is NOT greater than now date")
}