Calendar Native works weird for me

[kotran88]

I'm using ionic3 and when I load event, it's weird.

I logged item in below code which should be event object of calendar it dosent have notes only have allDay, calendar_id,dtend,dtstart,eventLocation,event_id,id,title object. and tend and dtstart come with unix timestamp. I think it should be startDate and endDate. not dtstart/dtend. and unix timestamp comes with weird number. when I calculate to human Date , it says 2025/08/25 like this.

loadEventThisMonth() {
    console.log("loadEventThisMonth")
    this.eventList = new Array();
    var startDate = new Date(this.date.getFullYear(), this.date.getMonth(), 1);
    var endDate = new Date(this.date.getFullYear(), this.date.getMonth()+1, 0);
    console.log(startDate+"and : "+endDate);
    this.calendar.listEventsInRange(startDate, endDate).then(
      (msg) => {
        console.log("home msg:");
        console.log(msg);
        msg.forEach(item => {
          console.log(item);   //

          console.log(item.startDate+"///")
          this.eventList.push(item);
        });
      },
      (err) => {
        console.log(err);
      }
    );
  }