Temporal.PlainDateTime.prototype.calendarId

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 calendarId accessor property of Temporal.PlainDateTime instances returns a string representing the calendar used to interpret the internal ISO 8601 date.

See Intl.supportedValuesOf() for a list of commonly supported calendar types.

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

Examples

Using calendarId

const dt = Temporal.PlainDateTime.from("2021-07-01T08:00:00");
console.log(dt.calendarId); // "iso8601"; default

const dt2 = Temporal.PlainDateTime.from("2021-07-01T08:00:00[u-ca=chinese]");
console.log(dt2.calendarId); // "chinese"

const dt3 = dt2.withCalendar("hebrew");
console.log(dt3.calendarId); // "hebrew"