Temporal.PlainDate.prototype.year

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The year accessor property of Temporal.PlainDate instances returns an integer representing the number of years of this date relative to the start of a calendar-specific epoch year. It is calendar-dependent.

This property has the same function as the era/eraYear pair as a unique identifier of a year in a calendar. Usually year 1 is either the first year of the latest era or the ISO 8601 year 0001. Because year is relative to the start of the epoch year, not the epoch date, if the epoch is in the middle of the year, that year will have the same value before and after the start date of the era.

The set accessor of year is undefined. You cannot change this property directly. Use the with() method to create a new Temporal.PlainDate object with the desired new value.

Examples

Using year

const date = Temporal.PlainDate.from("2021-07-01"); // ISO 8601 calendar
console.log(date.year); // 2021

const date2 = Temporal.PlainDate.from("-002021-07-01");
console.log(date2.year); // -2021

const date3 = Temporal.PlainDate.from("2021-07-01[u-ca=japanese]");
console.log(date3.year); // 2021; although the Japanese calendar uses eras,
// there's no obvious "default era", so the year is the same as the ISO year

const date4 = Temporal.PlainDate.from("2021-07-01[u-ca=hebrew]");
console.log(date4.year); // 5781; the Hebrew calendar uses the Anno Mundi epoch, which starts in 3761 BC

Specifications

Specification
Temporal proposal # sec-get-temporal.plaindate.prototype.year

Browser compatibility

	Desktop					Mobile						Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	Deno	Node.js
`year`	No	No	No	No	No	No	No	No	No	No	No	1.40	No

Examples

Using year

Specifications

Browser compatibility

See also