The withCalendar() method of Temporal.PlainDateTime instances returns a new Temporal.PlainDateTime object representing this date-time interpreted in the new calendar system. Because all Temporal objects are designed to be immutable, this method essentially functions as the setter for the date-time's calendarId property.

To replace the date-time component properties, use the with() method instead.

Syntax

withCalendar(calendar)

Parameters

calendar

A string that corresponds to the calendarId property. See Intl.supportedValuesOf() for a list of commonly supported calendar types.

Return value

A new Temporal.PlainDateTime object, representing the date-time specified by the original PlainDateTime, interpreted in the new calendar system.

Exceptions

TypeError

Thrown if calendar is not a string.

RangeError

Thrown if calendar is not a valid calendar identifier.

Examples

Using withCalendar()

const dt = Temporal.PlainDateTime.from("2021-07-01T12:34:56");
const newDT = dt.withCalendar("islamic-umalqura");
console.log(newDT.toLocaleString("en-US", { calendar: "islamic-umalqura" }));
// 11/21/1442 AH, 12:34:56 PM

Specifications

Browser compatibility

See also

• Temporal.PlainDateTime
• Temporal.PlainDateTime.prototype.with()
• Temporal.PlainDateTime.prototype.withPlainTime()
• Temporal.PlainDateTime.from()
• Temporal.PlainDateTime.prototype.calendarId