setHours Method (Date) (JavaScript)

2017-1-18 1 min to read Contributors

Sets the hour value in the Date object using local time.

Syntax


dateObj.setHours(numHours[, numMin[, numSec[, numMilli]]])

Parameters

dateObj
Required. Any Date object.

numHours
Required. A numeric value equal to the hours value.

numMin
Optional. A numeric value equal to the minutes value. Must be supplied if either of the following arguments is used.

numSec
Optional. A numeric value equal to the seconds value. Must be supplied if the following argument is used.

numMilli
Optional. A numeric value equal to the milliseconds value.

Remarks

All set methods taking optional arguments use the value returned from corresponding get methods, if you do not specify an optional argument. For example, if the numMinutes argument is not specified, JavaScript uses the value returned from the getMinutes method.

To set the hours value using Universal Coordinated Time (UTC), use the setUTCHours method.

If the value of an argument is greater than its range or is a negative number, other stored values are modified accordingly. For example, if the stored date is "Jan 5, 1996 00:00:00", and setHours(30) is called, the date is changed to "Jan 6, 1996 06:00:00." Negative numbers have a similar behavior.

Example

The following example illustrates the use of the setHours method.

function SetHoursDemo(nhr, nmin, nsec){  
   var d, s;                     //Declare variables.  
   d = new Date();               //Create Date object.  
   d.setHours(nhr, nmin, nsec);  //Set hours, minutes, & seconds.  
   s = "Current setting is " + d.toLocaleString()   
   return(s);                    //Return new date setting.  
}

Requirements

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

Applies To: Date Object