Function toCalendar

packages/@internationalized/date/src/conversion.ts:338–352

(date: T, calendar: Calendar)

/** Converts a date from one calendar system to another. */
export function toCalendar<T extends AnyCalendarDate>(date: T, calendar: Calendar): T {
  if (isEqualCalendar(date.calendar, calendar)) {
    return date;
  }

  let calendarDate = calendar.fromJulianDay(date.calendar.toJulianDay(date));
  let copy: Mutable<T> = date.copy();
  copy.calendar = calendar;
  copy.era = calendarDate.era;
  copy.year = calendarDate.year;
  copy.month = calendarDate.month;
  copy.day = calendarDate.day;
  constrain(copy);
  return copy;
}

/**
 * Converts a date value to a `ZonedDateTime` in the provided time zone. The `disambiguation` option