JavaScript built-in objects date common functions

Get current time
var dt = new Date ();
alert (DT);
Incoming time
var dt1 = new Date ("2017-08-12");
alert (DT1);
//
Gets the time object (in milliseconds)
var DT2 = Date.now ();
alert (DT2);
//
var dt3 = new Date ();
Get year
Alert (Dt3.getfullyear ());
Get month
Alert (Dt3.getmonth () + 1);//is the real month starting from 0 plus 1
Get Date
Alert (Dt3.getdate ());
Get hours
Alert (dt3.gethours ());
Get minutes
Alert (Dt3.getminutes ());
Get seconds
Alert (Dt3.getseconds ());
Get Week
Alert (Dt3.getday ());

var dt = new Date ();
Alert (dt.todatestring ());//English--date
Alert (dt.tolocaledatestring ());//number format--date
Alert (dt.totimestring ());//hours, minutes, seconds
Alert (dt.tolocaletimestring ());//hours, minutes, seconds
Alert (dt.valueof ());//Gets the millisecond value of the time
alert (DT);
Convert to String
Alert (dt.tostring ());

JavaScript built-in objects date common functions