setMonth Method (Date) (JavaScript)

dateObj

Required. Any Date object.

numMonth

Required. A numeric value equal to the month. The value for January is 0, and other month values follow consecutively.

dateVal

Optional. A numeric value representing the day of the month. If this value is not supplied, the value from a call to the getDate method is used.

To set the month value using Universal Coordinated Time (UTC), use the setUTCMonth method.

If the value of numMonth is greater than 11 (January is month 0) or is a negative number, the stored year is modified accordingly. For example, if the stored date is "Jan 5, 1996" and setMonth(14) is called, the date is changed to "Mar 5, 1997."

The setFullYear method can be used to set the year, month, and day of the month.

The following example illustrates the use of the setMonth method.

date = new Date('1/1/1990');
date.setMonth(14);
document.write(date);

// Output: Fri Mar 1 00:00:00 PST 1991
// Note that the time zone corresponds to the time zone on the local computer.

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. Also supported in Windows Store apps. See Version Information.

Applies To: Date Object (JavaScript)

Reference