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The toString() method of Temporal.PlainMonthDay instances returns a string representing this month-day in the RFC 9557 format.

The daysInWeek accessor property of Temporal.PlainDate instances returns a positive integer representing the number of days in the week of this date. It is calendar-dependent.

The toPlainMonthDay() method of Temporal.PlainDate instances returns a new Temporal.PlainMonthDay object representing the monthCode and day of this date in the same calendar system.

The toZonedDateTime() method of Temporal.PlainDateTime instances returns a new Temporal.ZonedDateTime instance representing the same date-time as this plain date-time, but in the specified time zone.

The since() method of Temporal.PlainTime instances returns a new Temporal.Duration object representing the duration from another time (in a form convertible by Temporal.PlainTime.from()) to this time. The duration is positive if the other time is before this time, and negative if after.

The offset accessor property of Temporal.ZonedDateTime instances returns a string representing the offset used to interpret the internal instant, in the form ±HH:mm (or ±HH:mm:ss.sssssssss with as much subminute precision as necessary). This offset is guaranteed to be valid for the given instant and time zone at construction time.

The toString() method of Temporal.PlainDate instances returns a string representing this date in the RFC 9557 format.

The toLocaleString() method of Temporal.PlainYearMonth instances returns a string with a language-sensitive representation of this year-month. In implementations with Intl.DateTimeFormat API support, this method delegates to Intl.DateTimeFormat.