The daysInWeek accessor property of Temporal.PlainDate instances returns a positive integer representing the number of days in the week of this date. It is calendar-dependent.

For the ISO 8601 calendar, this is always 7, but in other calendar systems it may differ from week to week. All commonly supported calendars use 7-day weeks.

The set accessor of daysInWeek is undefined. You cannot change this property directly.

Examples

Using daysInWeek

const date = Temporal.PlainDate.from("2021-07-01");
console.log(date.daysInWeek); // 7

const date2 = Temporal.PlainDate.from("2021-07-01[u-ca=chinese]");
console.log(date2.daysInWeek); // 7

Specifications

Browser compatibility

See also

• Temporal.PlainDate
• Temporal.PlainDate.prototype.with()
• Temporal.PlainDate.prototype.add()
• Temporal.PlainDate.prototype.subtract()
• Temporal.PlainDate.prototype.yearOfWeek
• Temporal.PlainDate.prototype.weekOfYear
• Temporal.PlainDate.prototype.dayOfWeek
• Temporal.PlainDate.prototype.daysInMonth
• Temporal.PlainDate.prototype.daysInYear