Temporal.PlainDateTime.prototype.dayOfWeek

The dayOfWeek accessor property of {{jsxref("Temporal.PlainDateTime")}} instances returns a positive integer representing the 1-based day index in the week of this date. Days in a week are numbered sequentially from 1 to {{jsxref("Temporal/PlainDateTime/daysInWeek", "daysInWeek")}}, with each number mapping to its name. It is calendar-dependent.

The set accessor of dayOfWeek is undefined. You cannot change this property directly. To create a new Temporal.PlainDateTime object with the desired new dayOfWeek value, use the {{jsxref("Temporal/PlainDateTime/add", "add()")}} or {{jsxref("Temporal/PlainDateTime/subtract", "subtract()")}} method with the appropriate number of days.

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

Examples#

Using dayOfWeek#

const dt = Temporal.PlainDateTime.from("2021-07-01");
console.log(dt.dayOfWeek); // 4; Thursday

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

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