Temporal.ZonedDateTime.prototype.daysInMonth

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 daysInMonth accessor property of Temporal.ZonedDateTime instances returns a positive integer representing the number of days in the month of this date. It is calendar-dependent.

The set accessor of daysInMonth is undefined. You cannot change this property directly.

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

Examples

Using daysInMonth

js
const dt = Temporal.ZonedDateTime.from("2021-07-01[America/New_York]");
console.log(dt.daysInMonth); // 31

Specifications

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

Browser compatibility

BCD tables only load in the browser

See also