method Temporal.Calendar.prototype.month Calendar.prototype.month(date: Temporal.PlainDate | Temporal.PlainDateTime | Temporal.PlainYearMonth | Temporal.PlainMonthDay | PlainDateLike | string): number Parameters date: Temporal.PlainDate | Temporal.PlainDateTime | Temporal.PlainYearMonth | Temporal.PlainMonthDay | PlainDateLike | string Return Type number