Temporal.PlainMonthDay.prototype.monthCode
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
- experimental technology
Check the Browser compatibility table carefully before using this in production.
The monthCode accessor property of calendar-dependent.
Usually it is M plus a two-digit month number. For leap months, it is the previous month's code followed by L (even if it's conceptually a derivative of the following month; for example, in the Hebrew calendar, Adar I has code M05L but Adar II has code M06). If the leap month is the first month of the year, the code is M00L.
Because month is an index within a year, but PlainMonthDay doesn't have a year, there's no month property for PlainMonthDay. Therefore, monthCode is used to represent the month in a way that is independent of the year.
The set accessor of monthCode is undefined. You cannot change this property directly. Use the with() method to create a new Temporal.PlainMonthDay object with the desired new value.
For general information and more examples, see Temporal.PlainDate.prototype.monthCode.