Dates & Times

Date objects use an integer value that is the number of milliseconds since 1 January 1970 UTC.
Dates are based on a time value that is the number of milliseconds since 1 January 1970 UTC.

The default date format is MM/DD/YYYY

myDate.toISOString() converts a date to a string with format YYYY-MM-DD T HH:mm:ss.sss2 ? 

The Date is infact an interface not a data type

var date1 = new Date("January 5, 2019 02:36:00") 
console.log(date1) 

JavaScript counts months from 0 to 11.

Dates are declared using the Date constructor
This is an object
The month parameter is zero based

var myDate = new Date(2020,11,01);   //this is December 
var myDate = new Date("1 July 2020"); 
var myTodaysDate = new Date(); 

const myDate = '20.10.1999';  

var myDate = new Date(); 
var myHour = myDate.getHours(); 

By default, JavaScript will use the browser's time zone and display a date as a full text string:
Tue Jul 06 2021 15:14:53 GMT+0100 (British Summer Time)

Printing Dates

By default console.log will output using a standardised output that is not 1-based.
All times are based on UTC

var myDate = new Date(2020, 7, 14); 
console.log(myDate); // 2020-08-14 ?????? 

Datejs library

datejs.com