There is absolutely no reason you should feel compelled to offer the full DateTime.pm interface. Offer what makes sense for _your_ calendar. The Julian calendar is actually a really _bad_ example for other calendar module authors, because it's API is almost identical to the Gregorian calendar (DateTime.pm). Most other calendars will have a greater departure from the DateTime.pm API.
So what about the Calendar that I just wrote: It gives you Japanese eras, and that's pretty much the only additional feature over DateTime.
Since nothing really changes in the way dates or time are counted, I just thought that it would be easier if it just inherited from DateTime instead of implementing each method like the Julian Calendar.
Was that a bad thing to do?
--d
