The Date object lets us work with dates. A date consists of a year, a month, a day, an hour, a minute, a second, and milliseconds. 

Date objects are created with the new Date() constructor.

There are 4 ways of initiating a date.

Using new Date(), creates a new date object with the current date and time.

When using new Date(date string), creates a new date object from the specified date and time.

Using new Date(number), creates a new date objects as zero  time plus the number.

Zero time is 01 Jan 1970 00:00:00 UTC. The number is specified in milliseconds.

Using new Date(7 numbers), creates a new date object with the specified date & time.

The 7 numbers specify the year, month, day, hour, minute, second, millisecond.

new Date(7 number) can be used only typed 4 numbers. minute, second and millisecond can be omitted.

JSP counts months from 0 to 11, January is 0, December is 11.

● Displaying Dates

The toUTCString() method converts a date to a UTC string ( a date display standard).

 

The toDateString() method converts a date to a more readable format.

Date objects are static. The computer time is ticking, but date objects, once created, are not.

● Time Zones

 When getting a date, without specifying the time zone, the result is converted to the browser's time zone.

 In other words, If a date/time is created in GMT ( Greenwich Mean Time ), the date/time will be converted to CDT ( Central US Daylight Time ) if a user browses from central US.