The setFullYear() method of Date instances changes the year, month, and/or day of month for this date according to local time.

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setFullYear(yearValue, monthValue)
setFullYear(yearValue, monthValue, dateValue)



An integer representing the year. For example, 1995.

monthValue Optional

An integer representing the month: 0 for January, 1 for February, and so on.

dateValue Optional

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 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.


If you do not specify the monthValue and dateValue parameters, the same values as what are returned by getMonth() and getDate() are used.

If a parameter you specify is outside of the expected range, other parameters and the date information in the Date object are updated accordingly. For example, if you specify 15 for monthValue, the year is incremented by 1 (yearValue + 1), and 3 is used for the month.


Using setFullYear()

const theBigDay = new Date();


ECMAScript Language Specification
# sec-date.prototype.setfullyear

Browser compatibility

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See also