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JavaScript Date setFullYear()

Example 1

const d = new Date();
d.setFullYear(2020);
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Definition and Usage

setFullYear() sets the year of a date.

setFullYear() can also set month and day.

Example 2

const d = new Date();
d.setFullYear(2020, 10, 3);
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Example 3

Set the date to six months ago:

const d = new Date();
d.setFullYear(d.getFullYear(), d.getMonth() - 6);
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Browser Support

setFullYear() is an ES1 feature (JavaScript 1997). It is fully supported in all browsers:

Chrome IE Edge Firefox Safari Opera
Yes Yes Yes Yes Yes Yes


Syntax

Date.setFullYear(year, month, day)

Parameters

year Required.
The year. Negative values are allowed.
month Optional.
The month (0 to 11).

Higher and lower values are handeled with date maths:

  • -1 will result in the last month of the previous year
  • 12 will result in the first month of the next year
  • 13 will result in the second month of the next year
day Optional.
The day (0 to 31).

Higher and lower values are handeled with date maths:

  • 0 gives the last day of the previous month
  • -1 gives the day before the last day of the previous month
  • 32 gives the first day of the next month (if 31 days)
  • 41 gives the tenth day of the next month (if 31 days)

Return Value

A number.

Number of milliseconds between the date and January 1, 1970 00:00:00 UTC.