files/en-us/web/javascript/reference/global_objects/date/setutcfullyear/index.md

metadata

title: Date.prototype.setUTCFullYear()
short-title: setUTCFullYear()
slug: Web/JavaScript/Reference/Global_Objects/Date/setUTCFullYear
page-type: javascript-instance-method
browser-compat: javascript.builtins.Date.setUTCFullYear
sidebar: jsref

The setUTCFullYear() method of {{jsxref("Date")}} instances changes the year for this date according to universal time.

{{InteractiveExample("JavaScript Demo: Date.prototype.setUTCFullYear()")}}

const event = new Date("December 31, 1975 23:15:30 GMT-3:00");

console.log(event.getUTCFullYear());
// Expected output: 1976

console.log(event.toUTCString());
// Expected output: "Thu, 01 Jan 1976 02:15:30 GMT"

event.setUTCFullYear(1975);

console.log(event.toUTCString());
// Expected output: "Wed, 01 Jan 1975 02:15:30 GMT"

Syntax

setUTCFullYear(yearValue)
setUTCFullYear(yearValue, monthValue)
setUTCFullYear(yearValue, monthValue, dateValue)

Parameters

• yearValue
  • : An integer representing the year. For example, 1995.
• monthValue {{optional_inline}}
  • : An integer representing the month: 0 for January, 1 for February, and so on.
• dateValue {{optional_inline}}
  • : An integer between 1 and 31 representing the day of the month. If you specify dateValue, you must also specify monthValue.

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 monthValue and dateValue parameters, the values returned from the {{jsxref("Date/getUTCMonth", "getUTCMonth()")}} and {{jsxref("Date/getUTCDate", "getUTCDate()")}} methods are used.

If a parameter you specify is outside of the expected range, setUTCFullYear() attempts to update the other parameters and the date information in the {{jsxref("Date")}} object accordingly. For example, if you specify 15 for monthValue, the year is incremented by 1 (yearValue + 1), and 3 is used for the month.

Examples

Using setUTCFullYear()

const theBigDay = new Date();
theBigDay.setUTCFullYear(1997);

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{jsxref("Date.prototype.getUTCFullYear()")}}
• {{jsxref("Date.prototype.setFullYear()")}}