269. JDay - Julian and Gregorian Calendar Programs
Три программы для вычисления даты по Грегорианскомуили Юлианскому календарю. Calendar - determines the Gregorian calendar date and Universal Time by the given decimal Julian Day number (JD).JDay2 - determines the Julian Day number (JD) and day fraction by the given Julian or Gregorian calendar date and the Universal Time.ModJDay - determines the Modified Julian Day number (MJD) and day fraction by the given Julian or Gregorian calendar date and the Universal Time.