Temporal.PlainDateTime.prototype.daysInMonth

The daysInMonth accessor property of {{jsxref("Temporal.PlainDateTime")}} 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 dt = Temporal.PlainDateTime.from("2021-07-01");
console.log(dt.daysInMonth); // 31

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

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