The year accessor property of Temporal.ZonedDateTime instances returns an integer representing the number of years of this date relative to the start of a calendar-specific epoch year. It is calendar-dependent.
The set accessor of year is undefined. You cannot change this property directly. Use the with() method to create a new Temporal.ZonedDateTime object with the desired new value.
For general information and more examples, see Temporal.PlainDate.prototype.year.
const dt = Temporal.ZonedDateTime.from("2021-07-01[America/New_York]"); // ISO 8601 calendar
console.log(dt.year); // 2021Temporal.ZonedDateTimeTemporal.ZonedDateTime.prototype.with()Temporal.ZonedDateTime.prototype.add()Temporal.ZonedDateTime.prototype.subtract()Temporal.ZonedDateTime.prototype.eraTemporal.ZonedDateTime.prototype.eraYearTemporal.ZonedDateTime.prototype.yearOfWeekTemporal.ZonedDateTime.prototype.monthTemporal.ZonedDateTime.prototype.dayTemporal.PlainDate.prototype.year