The daysInWeek accessor property of Temporal.ZonedDateTime instances returns a positive integer representing the number of days in the week of this date. It is calendar-dependent.
The set accessor of daysInWeek is undefined. You cannot change this property directly.
For general information and more examples, see Temporal.PlainDate.prototype.daysInWeek.
const dt = Temporal.ZonedDateTime.from("2021-07-01[America/New_York]");
console.log(dt.daysInWeek); // 7Temporal.ZonedDateTimeTemporal.ZonedDateTime.prototype.with()Temporal.ZonedDateTime.prototype.add()Temporal.ZonedDateTime.prototype.subtract()Temporal.ZonedDateTime.prototype.yearOfWeekTemporal.ZonedDateTime.prototype.weekOfYearTemporal.ZonedDateTime.prototype.dayOfWeekTemporal.ZonedDateTime.prototype.daysInMonthTemporal.ZonedDateTime.prototype.daysInYearTemporal.PlainDate.prototype.daysInWeek