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JavaScript setHours() Method

❮ JavaScript Date Object

Example

Set the hour to 15:

var d = new Date();
d.setHours(15);
Try it Yourself »

More "Try it Yourself" examples below.

Definition and Usage

The setHours() method sets the hour of a date object.

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

Browser Support

Method
setHours() Yes Yes Yes Yes Yes

Syntax

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

Parameter Values

Parameter Description
hour Required. An integer representing the hour.

Expected values are 0-23, but other values are allowed:

  • -1 will result in the last hour of the previous day
  • 24 will result in the first hour of the next day
min Optional. An integer representing the minutes.

Expected values are 0-59, but other values are allowed:

  • -1 will result in the last minute of the previous hour
  • 60 will result in the first minute of the next hour
sec Optional. An integer representing the seconds

Expected values are 0-59, but other values are allowed:

  • -1 will result in the last second of the previous minute
  • 60 will result in the first second of the next minute
millisec Optional. An integer representing the milliseconds

Expected values are 0-999, but other values are allowed:

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

Technical Details

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

More Examples

Example

Set the time to 15:35:01

var d = new Date();
d.setHours(15, 35, 1);
Try it Yourself »

Example

Set the time to 48 hours ago:

var d = new Date();
d.setHours(d.getHours() - 48);
Try it Yourself »
❮ JavaScript Date Object