Temporal.ZonedDateTime.prototype.weekOfYear

The weekOfYear accessor property of {{jsxref("Temporal.ZonedDateTime")}} instances returns a positive integer representing the 1-based week index in the {{jsxref("Temporal/ZonedDateTime/yearOfWeek", "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 {{jsxref("Temporal/ZonedDateTime/add", "add()")}} or {{jsxref("Temporal/ZonedDateTime/subtract", "subtract()")}} method with the appropriate number of weeks.

For general information and more examples, see {{jsxref("Temporal/PlainDate/weekOfYear", "Temporal.PlainDate.prototype.weekOfYear")}}.

Examples#

Using weekOfYear#

const dt = Temporal.ZonedDateTime.from("2021-07-01[America/New_York]");
console.log(dt.weekOfYear); // 26

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• {{jsxref("Temporal.ZonedDateTime")}}
• {{jsxref("Temporal/ZonedDateTime/with", "Temporal.ZonedDateTime.prototype.with()")}}
• {{jsxref("Temporal/ZonedDateTime/add", "Temporal.ZonedDateTime.prototype.add()")}}
• {{jsxref("Temporal/ZonedDateTime/subtract", "Temporal.ZonedDateTime.prototype.subtract()")}}
• {{jsxref("Temporal/ZonedDateTime/yearOfWeek", "Temporal.ZonedDateTime.prototype.yearOfWeek")}}
• {{jsxref("Temporal/ZonedDateTime/dayOfWeek", "Temporal.ZonedDateTime.prototype.dayOfWeek")}}
• {{jsxref("Temporal/ZonedDateTime/daysInWeek", "Temporal.ZonedDateTime.prototype.daysInWeek")}}
• {{jsxref("Temporal/ZonedDateTime/daysInYear", "Temporal.ZonedDateTime.prototype.daysInYear")}}
• {{jsxref("Temporal/PlainDate/weekOfYear", "Temporal.PlainDate.prototype.weekOfYear")}}