Temporal.PlainDateTime.prototype.inLeapYear

The inLeapYear accessor property of {{jsxref("Temporal.PlainDateTime")}} instances returns a boolean indicating whether this date is in a leap year. A leap year is a year that has more days (due to a leap day or leap month) than a common year. It is calendar-dependent.

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

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

Examples#

Using inLeapYear#

const dt = Temporal.PlainDateTime.from("2021-07-01");
console.log(dt.inLeapYear); // false
console.log(dt.daysInYear); // 365
console.log(dt.monthsInYear); // 12

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/year", "Temporal.PlainDateTime.prototype.year")}}
• {{jsxref("Temporal/PlainDateTime/daysInYear", "Temporal.PlainDateTime.prototype.daysInYear")}}
• {{jsxref("Temporal/PlainDateTime/monthsInYear", "Temporal.PlainDateTime.prototype.monthsInYear")}}
• {{jsxref("Temporal/PlainDate/inLeapYear", "Temporal.PlainDate.prototype.inLeapYear")}}