Temporal.PlainYearMonth.prototype.daysInMonth

The daysInMonth accessor property of {{jsxref("Temporal.PlainYearMonth")}} 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 {{jsxref("Temporal/PlainDate/daysInMonth", "Temporal.PlainDate.prototype.daysInMonth")}}.

Examples#

Using daysInMonth#

const ym = Temporal.PlainYearMonth.from("2021-07");
console.log(ym.daysInMonth); // 31

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("Temporal.PlainYearMonth")}}
• {{jsxref("Temporal/PlainYearMonth/with", "Temporal.PlainYearMonth.prototype.with()")}}
• {{jsxref("Temporal/PlainYearMonth/add", "Temporal.PlainYearMonth.prototype.add()")}}
• {{jsxref("Temporal/PlainYearMonth/subtract", "Temporal.PlainYearMonth.prototype.subtract()")}}
• {{jsxref("Temporal/PlainYearMonth/year", "Temporal.PlainYearMonth.prototype.year")}}
• {{jsxref("Temporal/PlainYearMonth/month", "Temporal.PlainYearMonth.prototype.month")}}
• {{jsxref("Temporal/PlainYearMonth/daysInYear", "Temporal.PlainYearMonth.prototype.daysInYear")}}
• {{jsxref("Temporal/PlainDate/daysInMonth", "Temporal.PlainDate.prototype.daysInMonth")}}