Temporal.ZonedDateTime.prototype.dayOfYear

The dayOfYear accessor property of {{jsxref("Temporal.ZonedDateTime")}} instances returns a positive integer representing the 1-based day index in the year of this date. The first day of this year is 1, and the last day is the {{jsxref("Temporal/ZonedDateTime/daysInYear", "daysInYear")}}. It is calendar-dependent.

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

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

Examples#

Using dayOfYear#

const dt = Temporal.ZonedDateTime.from("2021-07-01[America/New_York]");
console.log(dt.dayOfYear); // 182

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/year", "Temporal.ZonedDateTime.prototype.year")}}
• {{jsxref("Temporal/ZonedDateTime/day", "Temporal.ZonedDateTime.prototype.day")}}
• {{jsxref("Temporal/ZonedDateTime/dayOfWeek", "Temporal.ZonedDateTime.prototype.dayOfWeek")}}
• {{jsxref("Temporal/ZonedDateTime/daysInYear", "Temporal.ZonedDateTime.prototype.daysInYear")}}
• {{jsxref("Temporal/PlainDate/dayOfYear", "Temporal.PlainDate.prototype.dayOfYear")}}