Temporal.PlainYearMonth.prototype.month

The month accessor property of {{jsxref("Temporal.PlainYearMonth")}} instances returns a positive integer representing the 1-based month index in the year of this year-month. The first month of this year is 1, and the last month is the {{jsxref("Temporal/PlainYearMonth/monthsInYear", "monthsInYear")}}. It is calendar-dependent.

The set accessor of month is undefined. You cannot change this property directly. Use the {{jsxref("Temporal/PlainYearMonth/with", "with()")}} method to create a new Temporal.PlainYearMonth object with the desired new value.

For general information and more examples, see {{jsxref("Temporal/PlainDate/month", "Temporal.PlainDate.prototype.month")}}.

Examples#

Using month#

const ym = Temporal.PlainYearMonth.from("2021-07"); // ISO 8601 calendar
console.log(ym.monthCode); // "M07"
console.log(ym.month); // 7

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/monthCode", "Temporal.PlainYearMonth.prototype.monthCode")}}
• {{jsxref("Temporal/PlainYearMonth/daysInMonth", "Temporal.PlainYearMonth.prototype.daysInMonth")}}
• {{jsxref("Temporal/PlainYearMonth/monthsInYear", "Temporal.PlainYearMonth.prototype.monthsInYear")}}
• {{jsxref("Temporal/PlainDate/month", "Temporal.PlainDate.prototype.month")}}