Temporal.ZonedDateTime.prototype.inLeapYear

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 inLeapYear accessor property of Temporal.ZonedDateTime instances returns a boolean indicating whether this date is in a leap year. A leap year is a year that has more days (due to a leap day or leap month) than a common year. It is calendar-dependent.

The set accessor of inLeapYear is undefined. You cannot change this property directly.

For general information and more examples, see Temporal.PlainDate.prototype.inLeapYear.

Examples

Using inLeapYear

const dt = Temporal.ZonedDateTime.from("2021-07-01[America/New_York]");
console.log(dt.inLeapYear); // false
console.log(dt.daysInYear); // 365
console.log(dt.monthsInYear); // 12

Specifications

Specification
Temporal proposal # sec-get-temporal.zoneddatetime.prototype.inleapyear

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
`inLeapYear`	No	No	No	No	No	No	No	No	No	No	No	1.40	No

Examples

Using inLeapYear

Specifications

Browser compatibility

See also