Date.setHours()

Sets the hour of a date object

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 D

var event = new Date('August 19, 1975 23:15:30');
event.setHours(20);

console.log(event);
// expected output: Tue Aug 19 1975 20:15:30 GMT+0200 (CEST)
// (note: your timezone may vary)

event.setHours(20,21,22);

console.log(event);
// expected output: Tue Aug 19 1975 20:21:22 GMT+0200 (CEST)

Syntax

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

Versions prior to JavaScript 1.3

dateObj.setHours(hoursValue)

Parameters

hoursValueIdeally, 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.

minutesValueOptional. 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.

secondsValueOptional. 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.

msValueOptional. 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);

References

Date.prototype.setHours() - JavaScript | MDNMDN Web Docs

Contributors to this page

Uros Durdevic