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

The equals() method of Temporal.PlainTime instances returns true if this time is equivalent in value to another time (in a form convertible by Temporal.PlainTime.from()), and false otherwise. They are compared by their time values. It is equivalent to Temporal.PlainTime.compare(this, other) === 0.

The valueOf() method of Temporal.ZonedDateTime instances throws a TypeError, which prevents Temporal.ZonedDateTime instances from being implicitly converted to primitives when used in arithmetic or comparison operations.

The eraYear accessor property of Temporal.PlainDateTime instances returns a non-negative integer representing the year of this date within the era, or undefined if the calendar does not use eras (e.g., ISO 8601). The year index usually starts from 1 (more common) or 0, and years in an era can decrease with time (e.g., Gregorian BCE). era and eraYear together uniquely identify a year in a calendar, in the same way that year does. It is calendar-dependent.

The subtract() method of Temporal.PlainTime instances returns a new Temporal.PlainTime object representing this time moved backward by a given duration (in a form convertible by Temporal.Duration.from()), wrapping around the clock if necessary.

The inLeapYear accessor property of Temporal.PlainDate instances returns a boolean indicating whether this date is in a leap year. A leap year is a year that has more days (due to a leap day or leap month) than a common year. It is calendar-dependent.

The second accessor property of Temporal.ZonedDateTime instances returns an integer from 0 to 59 representing the second component of this time.

The monthsInYear accessor property of Temporal.PlainYearMonth instances returns a positive integer representing the number of months in the year of this date. It is calendar-dependent.

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

The monthCode accessor property of Temporal.PlainDate instances returns a calendar-specific string representing the month of this date. It is calendar-dependent.