United Church Calendar

I once programmed a combined Catholic, Protestant, and Anglican Church calendar, to run under DOS. My program does more than 100 000 calculations to list one year's calendar. The calculation of Easter alone has been described as "an affair of considerable nicety and complication". But I realised recently that I was sitting with a lot of information -- still good, but unsuitable for Windows. Which means that, in a sense, I have a book which is already written. Today I looked into the possibility of publishing it.