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

The withTimeZone() method of Temporal.ZonedDateTime instances returns a new Temporal.ZonedDateTime object representing the same instant as this date-time but in the new time zone. Because all Temporal objects are designed to be immutable, this method essentially functions as the setter for the date-time's timeZoneId property.

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

The Temporal.Now namespace object contains static methods for getting the current time in various formats.

The toJSON() method of Temporal.Instant instances returns a string representing this instant in the same RFC 9557 format as calling toString(). It is intended to be implicitly called by JSON.stringify().

The era accessor property of Temporal.ZonedDateTime instances returns a calendar-specific lowercase string representing the era of this date, or undefined if the calendar does not use eras (e.g., ISO 8601). era and eraYear together uniquely identify a year in a calendar, in the same way that year does. It is calendar-dependent.

The dayOfWeek accessor property of Temporal.PlainDateTime instances returns a positive integer representing the 1-based day index in the week of this date. Days in a week are numbered sequentially from 1 to daysInWeek, with each number mapping to its name. It is calendar-dependent.

The with() method of Temporal.PlainDate instances returns a new Temporal.PlainDate object representing this date with some fields replaced by new values. Because all Temporal objects are designed to be immutable, this method essentially functions as the setter for the date's fields.

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

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