Computus – The calculation to determine the day of Easter

In my personal opinion, holidays that require an algorithm to calculate instead of being the same date each year deserve a special place in hell. And as far as these algorithms go, the one to calculate Easter is the worst, most complicated one I've seen.

I know that some algorithmic "holidays" like election day serve a legitimate purpose. (How about making election days national holidays already, federal government!?) But, as a programmer, I still despise the concept.