The setHours() method sets the hours for a specified date according to local time, and returns the number of milliseconds since January 1, 1970 00:00:00 UTC until the time represented by the updated Date instance.

Syntax

dateObj.setHours(hoursValue[, minutesValue[, secondsValue[, msValue]]])

Versions prior to JavaScript 1.3

dateObj.setHours(hoursValue)

Parameters

hoursValue
Ideally, an integer between 0 and 23, representing the hour. If a value greater than 23 is provided, the datetime will be incremented by the extra hours.
minutesValue
Optional. Ideally, an integer between 0 and 59, representing the minutes. If a value greater than 59 is provided, the datetime will be incremented by the extra minutes.
secondsValue
Optional. Ideally, an integer between 0 and 59, representing the seconds. If a value greater than 59 is provided, the datetime will be incremented by the extra seconds. If you specify the secondsValue parameter, you must also specify the minutesValue.
msValue
Optional. Ideally, a number between 0 and 999, representing the milliseconds. If a value greater than 999 is provided, the datetime will be incremented by the extra milliseconds. If you specify the msValue parameter, you must also specify the minutesValue and secondsValue.

Return value

The number of milliseconds between January 1, 1970 00:00:00 UTC and the updated date.

Description

If you do not specify the minutesValue, secondsValue, and msValue parameters, the values returned from the getMinutes(), getSeconds(), and getMilliseconds() methods are used.

If a parameter you specify is outside of the expected range, setHours() attempts to update the date information in the Date object accordingly. For example, if you use 100 for secondsValue, the minutes will be incremented by 1 (minutesValue + 1), and 40 will be used for seconds.

Examples

Using setHours()

var theBigDay = new Date();
theBigDay.setHours(7);

Specifications

Specification Status Comment
ECMAScript 1st Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.0.
ECMAScript 5.1 (ECMA-262)
The definition of 'Date.prototype.setHours' in that specification.
Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Date.prototype.setHours' in that specification.
Standard  
ECMAScript Latest Draft (ECMA-262)
The definition of 'Date.prototype.setHours' in that specification.
Draft  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes1 Yes Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes4 Yes Yes Yes

See also

Document Tags and Contributors

Last updated by: tshinnic,