Temporal.PlainDate.prototype.daysInYear
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The daysInYear accessor property of Temporal.PlainDate instances returns a positive integer representing the number of days in the year of this date. It is calendar-dependent.
For the ISO 8601 calendar, this is 365, or 366 in a leap year. In other calendar systems, it likely differs, especially in non-solar calendars.
The set accessor of daysInWeek is undefined. You cannot change this property directly.
Examples
Using daysInYear
js
const date = Temporal.PlainDate.from("2021-07-01");
console.log(date.daysInYear); // 365
const date2 = Temporal.PlainDate.from("2020-07-01");
console.log(date2.daysInYear); // 366; 2020 is a leap year
const date3 = Temporal.PlainDate.from("2021-07-01[u-ca=chinese]");
console.log(date3.daysInYear); // 354
const date4 = Temporal.PlainDate.from("2023-07-01[u-ca=chinese]");
console.log(date4.daysInYear); // 384; 2023 is a Chinese leap year
Specifications
| Specification |
|---|
| Temporal proposal # sec-get-temporal.plaindate.prototype.daysinyear |
Browser compatibility
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daysInYear | ||||||||||||||