inserting date into sharepoint hosted list using JSOM

function bookingRoomForMeeting() 

{

var ctx = new SP.ClientContext(appWebUrl);

  var list = ctx.get_web().get_lists().getByTitle("MyCalendarList"); //Get the List based upon the Title

var listCreationInformation = new SP.ListItemCreationInformation(); //Object for creating Item in the 

ListlistItem = list.addItem(listCreationInformation);

listItem.set_item('Title', $("#txt_Title").val());

var date = $("#txt_startTime").val();

var dateTime = moment(date, 'DD/MM/YYYY HH:mm a').format("MM/DD/YYYY HH:mm a");

listItem.set_item('EventDate', dateTime);

var enddate = $("#txt_endTime").val();

var enddateTime = moment(enddate, 'DD/MM/YYYY HH:mm a').format("MM/DD/YYYY HH:mm a");

listItem.set_item('EndDate', enddateTime);

listItem.set_item('EmailId1', $("#txt_EmailId1").val());

listItem.set_item('EmailId2', $("#txt_EmailId2").val());

listItem.update();

ctx.load(listItem);

ctx.executeQueryAsync(Function.createDelegate(this, success),Function.createDelegate(this, fail));

}
function success() 

{

alert("Completed");

}
function fail() 

{

alert("operation failed");

}