Function parseAbsolute

packages/@internationalized/date/src/string.ts:165–195

(value: string, timeZone: string)

 * or "2021-11-07T07:45:00-07:00"). The result is converted to the provided time zone.
 */
export function parseAbsolute(value: string, timeZone: string): ZonedDateTime {
  let m = value.match(ABSOLUTE_RE);
  if (!m) {
    throw new Error('Invalid ISO 8601 date time string: ' + value);
  }

  let year = parseNumber(m[1], -9999, 9999);
  let era = year < 1 ? 'BC' : 'AD';

  let date: Mutable<ZonedDateTime> = new ZonedDateTime(
    era,
    year < 1 ? -year + 1 : year,
    parseNumber(m[2], 1, 12),
    1,
    timeZone,
    0,
    m[4] ? parseNumber(m[4], 0, 23) : 0,
    m[5] ? parseNumber(m[5], 0, 59) : 0,
    m[6] ? parseNumber(m[6], 0, 59) : 0,
    m[7] ? parseNumber(m[7], 0, Infinity) * 1000 : 0
  );

  date.day = parseNumber(m[3], 0, date.calendar.getDaysInMonth(date));

  if (m[8]) {
    date.offset =
      parseNumber(m[8], -23, 23) * 60 * 60 * 1000 + parseNumber(m[9] ?? '0', 0, 59) * 60 * 1000;
  }

  return toTimeZone(date as ZonedDateTime, timeZone);
}

/**
 * Parses an ISO 8601 date and time string with a UTC offset (e.g. "2021-11-07T07:45:00Z"