I did some extensive exploring, and what I found really REALLY irritates me. The vast majority of this application is bible quotes, this app could be about 200k but it's 1.7Mb of mostly bible quotes. This is sheer bloatware at its worst, the bloat adds no function at all, but merely serves to promote the author's christian agenda.

If anyone is interested in exploring, you will need "ResConv" to change the data files into resources. Download it at:
http://www.ziggy.speedhost.com/bdfreex.html
Start by converting the file PandoCalendar/Resources/PandoCalendar.rsrc into a MacOS 9 style resource file. Then you need to open the converted file in a resource editor. I used Resourcerer, which ran (mostly) OK in Classic, you could use ResEdit but I couldn't get that to run in Classic. Open up the "csfc" resource, open each resource (1001 through 1012) individually, select all the contents of that resource, then delete. Do that for each resource, resave, use ResConv to convert back to PandoCalendar.rsrc, drop it back into the place in the bundle where it belongs.
Change the date on your system to any sunday, and launch PandoCalendar. Now the bible quotes do not appear.. about 90% of the time. Ooh this app is persistent, it still pops up quotes about one launch in 10.
I poked around further, it appears that there is a deeply buried activity of religious proselytizing on Easter, as well as a huge section of bible quotes in the file Pandocalendar/Contents/MacOS/PandoCalendar, but I haven't successfully edited this yet. It might yield to another resource conversion and resedit, but I haven't tried it yet.

At this time, I can only say that if you dislike being whacked on the head with a bible every sunday and every easter, you should just avoid this program, it is not worth it. But if you are a weak-willed christian who can only sustain your shaky faith by being bombarded with out-of-context bible sayings, this is just the program for you.