Temporal.ZonedDateTime.prototype.weekOfYear

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The weekOfYear accessor property of Temporal.ZonedDateTime instances returns a positive integer representing the 1-based week index in the yearOfWeek of this date, or undefined if the calendar does not have a well-defined week system. The first week of the year is 1. It is calendar-dependent.

The set accessor of weekOfYear is undefined. You cannot change this property directly. To create a new Temporal.ZonedDateTime object with the desired new weekOfYear value, use the add() or subtract() method with the appropriate number of weeks.

For general information and more examples, see Temporal.PlainDate.prototype.weekOfYear.