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JavaScript Date setMonth() Method


Javascript date setMonth() method sets the month for a specified date according to local time.


The following syntax for setMonth () Method.

Date.setMonth(monthValue[, dayValue])

Note − Parameters in the bracket are always optional.

Parameter Detail

  • monthValue − An integer between 0 and 11 (representing the months January through December).

  • dayValue − An integer from 1 to 31, representing the day of the month.

  • msValue − A number between 0 and 999, representing the milliseconds. If you specify the msValue parameter, you must also specify the minutesValue and secondsValue.

If you do not specify the dayValue parameter, the value returned from the getDate method is used. If a parameter you specify is outside of the expected range, setMonth attempts to update the date information in the Date object accordingly. For example, if you use 15 for monthValue, the year will be incremented by 1 (year + 1), and 3 will be used for month.


Try the following example.

      <title>JavaScript setMonth Method</title>
      <script type = "text/javascript">
         var dt = new Date( "Aug 28, 2008 23:30:00" );
         dt.setMonth( 2 );
         document.write( dt );


Fri Mar 28 2008 23:30:00 GMT+0530 (India Standard Time)