Description: Calendars from down the centuries and across the world
Keywords: calendar, calendars, calender, julian, gregorian, john dee, roman, aztec, mayan, chinese, persian, date, time, leap year, month, week, day, kepler, planet, sun, focus, ellipse, orbit, equinox, solstice, intercalary, hebrew, indian, islamic, ethiopian, nepalese, michael astbury, mike astbury
Science Astronomy Calendars and Timekeeping 网站
2024年12月19日