JavaScript Date UTC() Method

In JavaScript, the Date.UTC() method is used to create a date object representing a specified date and time in UTC (Coordinated Universal Time). It accepts the year, month, day, hour, minute, second, and millisecond components of the date and returns the number of milliseconds since January 1, 1970, 00:00:00 UTC.

Date UTC() Method Syntax:

Date.UTC(year, month, day, hour, minute, second, millisecond);

Date UTC() Method Parameters:

year: To specify a year after 1900.
month: To specify an integer between 0 and 11 representing the month. Other values which are allowed are:
- -1 will represent the last month of the previous year.
- 12 will represent the first month of the next year.
- 13 will represent the second month of the next year.
day: It is an optional parameter. It is used to specify an integer between 1 and 31 representing the day of the month. Other values which are allowed are:
- 0 will represent the last hour of the previous month.
- -1 will represent the hour before the last hour of the previous month.
- If the month has 31 days then 32 will represent the first day of the next month.
- If the month has 30 days then 32 will represent the second day of the next month.
hour: It is an optional parameter. It is used to specify an integer between 0 and 23 representing the hours. Other values which are allowed are :
- -1 will represent the last hour of the previous day.
- 24 will represent the first hour of the next day.
minute: It is an optional parameter. It is used to specify an integer between 0 and 59 representing the minutes. Other values which are allowed are :
- -1 will represent the last minute of the previous hour.
- 60 will represent the first minute of the next hour.
second: It is an optional parameter. It is used to specify an integer between 0 and 59 representing the seconds. Other values which are allowed are:
- -1 will represent the last second of the previous minute.
- 60 will represent the first second of the next minute.
millisecond: It is an optional parameter. It is used to specify an integer between 0 and 999 representing the milliseconds. Other values which are allowed are :
- -1 will represent the last millisecond of the previous second.
- 1000 will represent the first millisecond of the next second.

Date UTC() Method Return value:

The Date.UTC() method returns a number representing the number of milliseconds in the given Date object since January 1, 1970, 00:00:00, universal time.

Date UTC() Method Example:

Below is an example of the Date UTC() method.

Javascript

let gfg = Date.UTC(2020, 07, 03);

console.log("Output : " + gfg);

Output

Output : 1596412800000

Explanation:

The code creates a UTC date object representing August 3, 2020, and returns the number of milliseconds since January 1, 1970, 00:00:00 UTC. The value is then logged to the console.

Date UTC() Method Example:

Three parameters are passed in the Date.UTC() method represents the year, month, and day respectively. The method returns the number of milliseconds between the date specified as the parameter and midnight of January 1, 1970.

Javascript

let test = Date.UTC(2010, 01, 28);

console.log("Output : " + test);

Output

Output : 1267315200000

Explanation:

The code creates a UTC date object representing February 28, 2010, and returns the number of milliseconds since January 1, 1970, 00:00:00 UTC. The value is then logged to the console.

JavaScript Date UTC() Method – UseCases:

1. JavaScript Get the start and end of the day in UTC

To get the start and end of the day in UTC, create a new Date object for the desired day, set the hours, minutes, seconds, and milliseconds to 0 for the start of the day, and set hours to 23, minutes to 59, seconds to 59, and milliseconds to 999 for the end of the day.

2. How to convert a JavaScript date to UTC?

To convert a JavaScript date to UTC, use the `toUTCString()`, `toISOString()`, or `toUTCString()` methods. Alternatively, use methods like `getUTCFullYear()`, `getUTCMonth()`, and `getUTCDate()` to construct a UTC date object.