Converts between Gregorian dates and other calendar systems. Calendars include: * Baha'i * French Republican * Hebrew * Indian Civil * Islamic * ISO * Julian * Mayan * Persian. The holidays module also provides some useful holiday-calculation, with a focus on North American and Jewish holidays. Note that in some calendar systems, the day begins at sundown. Convertdate uses noon of the day in question. from convertdate import french_republican from convertdate import hebrew french_republican.from_gregorian(2014, 10, 31) # (223, 2, 1, 9) hebrew.from_gregorian(2014, 10, 31) # (5775, 8, 7)