Temporal.PlainMonthDay.prototype.toPlainDate()

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 toPlainDate() method of Temporal.PlainMonthDay instances returns a new Temporal.PlainDate object representing this month-day and a supplied year in the same calendar system.

Syntax

toPlainDate(yearInfo)

Parameters

yearInfo

An object representing the year component of the resulting PlainDate, containing the following properties (in the order they are retrieved and validated):

era and eraYear: A string and an integer that correspond to the era and eraYear properties. Are only used if the calendar system has eras. era and eraYear must be provided simultaneously. If they are not provided, then year must be provided. If all of era, eraYear, and year are provided, they must be consistent.
year: Corresponds to the year property.

Return value

A new Temporal.PlainDate object representing the date specified by this month-day and the year in yearInfo, interpreted in the calendar system of this month-day.

Exceptions

RangeError: Thrown if any of the options is invalid.
TypeError: Thrown if yearInfo is not an object.

Examples

Using toPlainDate()

const md = Temporal.PlainMonthDay.from("07-01");
const date = md.toPlainDate({ year: 2021 });
console.log(date.toString()); // 2021-07-01

const md2 = Temporal.PlainMonthDay.from("2021-07-01[u-ca=japanese]");
const date2 = md2.toPlainDate({ era: "reiwa", eraYear: 1 });
console.log(date2.toString()); // 2019-07-01[u-ca=japanese]

Specifications

Specification
Temporal proposal # sec-temporal.plainmonthday.prototype.toplaindate

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
`toPlainDate`	No	No	No	No	No	No	No	No	No	No	No	1.40	No