title: Date.prototype.setUTCMonth()
short-title: setUTCMonth()
slug: Web/JavaScript/Reference/Global_Objects/Date/setUTCMonth
page-type: javascript-instance-method
browser-compat: javascript.builtins.Date.setUTCMonth
sidebar: jsref
The setUTCMonth() method of {{jsxref("Date")}} instances changes the month and/or day of the month for this date according to universal time.
{{InteractiveExample("JavaScript Demo: Date.prototype.setUTCMonth()")}}
const event = new Date("December 31, 1975 23:15:30 GMT-3:00");
console.log(event.toUTCString());
// Expected output: "Thu, 01 Jan 1976 02:15:30 GMT"
console.log(event.getUTCMonth());
// Expected output: 0
event.setUTCMonth(11);
console.log(event.toUTCString());
// Expected output: "Wed, 01 Dec 1976 02:15:30 GMT"
Syntax
setUTCMonth(monthValue)
setUTCMonth(monthValue, dateValue)
Parameters
monthValue- : An integer representing the month: 0 for January, 1 for February, and so on.
dateValue{{optional_inline}}- : An integer from 1 to 31 representing the day of the month.
Return value
Changes the {{jsxref("Date")}} object in place, and returns its new timestamp. If a parameter is NaN (or other values that get coerced to NaN, such as undefined), the date is set to Invalid Date and NaN is returned.
Description
If you do not specify the dateValue parameter, the value returned from the
{{jsxref("Date/getUTCDate", "getUTCDate()")}} method is used.
If a parameter you specify is outside of the expected range, setUTCMonth()
attempts to update the date information in the {{jsxref("Date")}} object accordingly.
For example, if you use 15 for monthValue, the year will be incremented by
1, and 3 will be used for month.
Examples
Using setUTCMonth()
const theBigDay = new Date();
theBigDay.setUTCMonth(11);
Specifications
{{Specifications}}
Browser compatibility
{{Compat}}
See also
- {{jsxref("Date.prototype.getUTCMonth()")}}
- {{jsxref("Date.prototype.setMonth()")}}