The equals() method of Temporal.ZonedDateTime instances returns true if this date-time is equivalent in value to another date-time (in a form convertible by Temporal.ZonedDateTime.from()), and false otherwise. They are compared both by their instant values, time zones, and their calendars, so two date-times from different calendars or time zones may be considered equal by Temporal.ZonedDateTime.compare() but not by equals().

The Temporal.PlainDate.from() static method creates a new Temporal.PlainDate object from another Temporal.PlainDate object, an object with date properties, or an RFC 9557 string.

The Temporal.PlainDate.compare() static method returns a number (-1, 0, or 1) indicating whether the first date comes before, is the same as, or comes after the second date. Equivalent to comparing the year, month, and day fields of the underlying ISO 8601 dates.

The Temporal.Instant.compare() static method returns a number (-1, 0, or 1) indicating whether the first instant comes before, is the same as, or comes after the second instant. It is equivalent to comparing the epochNanoseconds of the two instants.

The subtract() method of Temporal.ZonedDateTime instances returns a new Temporal.ZonedDateTime object representing this date-time moved backward by a given duration (in a form convertible by Temporal.Duration.from()).

The withCalendar() method of Temporal.ZonedDateTime instances returns a new Temporal.ZonedDateTime object representing this date-time interpreted in the new calendar system. Because all Temporal objects are designed to be immutable, this method essentially functions as the setter for the date-time's calendarId property.

The Temporal.PlainMonthDay() constructor creates Temporal.PlainMonthDay objects.

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

The month accessor property of Temporal.ZonedDateTime instances returns a positive integer representing the 1-based month index in the year of this date. The first month of this year is 1, and the last month is the monthsInYear. It is calendar-dependent.

The add() method of Temporal.PlainDate instances returns a new Temporal.PlainDate object representing this date moved forward by a given duration (in a form convertible by Temporal.Duration.from()).