WebTemporalTemporal.PlainMonthDayLiketype alias Temporal.PlainMonthDayLikeunstableProperties ##era: string | undefined optional#eraYear: number | undefined optional#year: number optional#month: number optional#monthCode: string optional#day: number optional#calendar: CalendarLike optional
type alias Temporal.PlainMonthDayLikeunstableProperties ##era: string | undefined optional#eraYear: number | undefined optional#year: number optional#month: number optional#monthCode: string optional#day: number optional#calendar: CalendarLike optional