Module Calendar_sig

module Calendar_sig: sig .. end

Calendar interface. A calendar combines a date and a time: it may be seen as a 6-uple (year, month, day, hour, minute, second).

If you only need operations on dates, you should better use a date implementation (like module Date). But if you need to manage more precise dates, use this module. The exact Julian period is now [January, 1st 4713 BC at midday GMT; January 22th, 3268 AC at midday GMT].

module type S = sig .. end

Common operations for all calendar representations.