Irv--
Thanks for your reply, and for the links to information.
Yes, that symmetrical leapyear system sounds like what I'd prefer, and what I was getting at in my posting. Thanks for the links to it. I'll read more about it. And yes I'm curious to check out the discussion about the lengths of the seasons.
Having a leapyear whenever needed could minimize the cyclical drift-from-center, and eliminate secular drift.
Yes, the Symmetry454 proposal used to by my favorite. But then I decided that having months whose length differed by an entire week would be inconvenient, business-wise, because the months are used as payment periods for rent and billing.
So now my favorite fixed calendar month-systems are the ones with equal months or year-divisions:
The one with 13 28-day months
One with 26 14-day year-divisions
and Asimov's 91-day seasonal year-divisions
(The 91-day divisions are my favorite)
Mike Ossipoff
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