Temporal.PlainYearMonth.prototype.toPlainDate()

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

Syntax

toPlainDate(dayInfo)

Parameters

• dayInfo Optional
  • : An object representing the day component of the resulting PlainDate, containing the following property:
    • day
      • : Corresponds to the day property.

Return value

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

Exceptions

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

Examples

Using toPlainDate()

const ym = Temporal.PlainYearMonth.from("2021-07");
const date = ym.toPlainDate({ day: 1 });
console.log(date.toString()); // 2021-07-01

const ym2 = Temporal.PlainYearMonth.from("2021-07-01[u-ca=chinese]");
const date2 = ym2.toPlainDate({ day: 15 });
console.log(date2.toString()); // 2021-06-24[u-ca=chinese]

Specifications

Browser compatibility

See also

• PlainYearMonth
• PlainDate
• Temporal.PlainDate.prototype.toPlainYearMonth()