missing yearOfWeek

[nlewycky]

The first few days of a year might be part of last year's final week. Hence tuple [year, weekOfYear] is not correct, you need a different calculation called yearOfWeek.

This property exists on:

• ZonedDateTime: https://tc39.es/proposal-temporal/docs/zoneddatetime.html#weekOfYear
• PlainDate: https://tc39.es/proposal-temporal/docs/plaindate.html#yearOfWeek
• PlainDateTime: https://tc39.es/proposal-temporal/docs/plaindatetime.html#yearOfWeek

[12wrigja]

Note for maintainers: this is implemented upstream in tc39/proposal-temporal@aa1c7b1.