JavaScript Date setHours() Method

Definition and Usage

setHours() Method to set the hour of the date object.

This method can also be used to set minutes, seconds, and milliseconds.

Example

Example 1

Set the hour to 15:

var d = new Date();
d.setHours(15);

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Example 2

Example

Set the time to 15:35:01

var d = new Date();
d.setHours(15, 35, 1);

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Example 3

Set the time to 48 hours ago:

var d = new Date();
d.setHours(d.getHours() - 48);

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Syntax

Date.setHours(hour, min, sec, millisec)

Parameter Value

Parameter Description
hour

Required. Represents the integer of hours.

The expected value is 0-23, but other values are allowed:

  • -1 will cause the last hour of the previous day
  • 24 will cause the first hour of the next day
min

Optional. Represents the integer of minutes.

The expected value is 0-59, but other values are allowed:

  • -1 will cause the last minute of the previous hour
  • 60 will cause the first minute of the next hour
sec

Optional. Represents the integer of seconds.

The expected value is 0-59, but other values are allowed:

  • -1 will cause the last second of the previous minute
  • 60 will cause the first second of the next minute
millisec

Optional. Represents the integer of milliseconds.

The expected value is 0-999, but other values are allowed:

  • -1 will cause the last millisecond of the previous second
  • 1000 will cause the first millisecond of the next second

Technical Details

Return Value: A number representing the milliseconds between the date object and midnight on January 1, 1970.
JavaScript Version: ECMAScript 1

Browser Support

Method Chrome IE Firefox Safari Opera
setHours() Support Support Support Support Support

Related Pages

Tutorial:JavaScript Date

Tutorial:JavaScript Date Format

Tutorial:JavaScript Date Setting Methods