The Date object in JavaScript helps us work with dates and times. It allows us to create, format, and extract information about specific moments in time.

To create a Date object with the current date and time:

const now = new Date();
console.log(now); // current date and time

The Date object automatically uses the user’s system time and timezone. This means the date and time will reflect the user’s local settings.

We can also create a Date object with specific values:

const birthday = new Date(1990, 5, 15); // June 15, 1990

Note: The month index starts from 0 (January is 0, December is 11).

The constructor accepts the following parameters in this order:

new Date(year, monthIndex, day, hours, minutes, seconds, milliseconds);

We can also create a date using a date-time string:

const meeting = new Date("2025-04-29T10:30:00");

Useful methods:

const date = new Date();

date.getFullYear();  // returns the full year
date.getMonth();     // returns the month (0-11)
date.getDate();      // returns the day of the month
date.getHours();     // returns the hour

There are also UTC versions of these methods:

date.getUTCFullYear();
date.getUTCHours();

These methods are helpful when you need consistent time values across different timezones.