Looking for ULTIMATE CALENDAR program listing

[Dieter]

(10-12-2015 08:27 AM)Ángel Martin Wrote:  Does anyone have a COMPLETE copy of this program? (reference UPL# 1593C). I'm putting together a calendar collection in a ROM image and this one would be a great addition for it.

(10-23-2015 10:40 AM)ggauny@live.fr Wrote:  May be you have an answer ? This program is VERY important fot those works on calendars calculations.

Please excuse my ignorance, but could one of the gentlemen kindly explain what's so special about this program? What does it do and why did it win an award?

Dieter