Temporal.ZonedDateTime.prototype.monthCode

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 monthCode accessor property of Temporal.ZonedDateTime instances returns a calendar-specific string representing the month of this date. It is calendar-dependent.

Usually it is M plus a two-digit month number. For leap months, it is the previous month's code followed by L (even if it's conceptually a derivative of the following month; for example, in the Hebrew calendar, Adar I has code M05L but Adar II has code M06). If the leap month is the first month of the year, the code is M00L.

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

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

Examples

Using monthCode

const date = Temporal.ZonedDateTime.from("2021-07-01[America/New_York]"); // ISO 8601 calendar
console.log(date.monthCode); // "M07"
console.log(date.month); // 7

Specifications

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

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
`monthCode`	No	No	No	No	No	No	No	No	No	No	No	1.40	No

Examples

Using monthCode

Specifications

Browser compatibility

See also