So calculating for what day Easter falls on is actually very easy.
first, it is based on a lunar calender. this is what we call a calender created by lunatics.
you get yourself the Spring Equinox, then you get the very next full moon, divide by pi, multiply by the gravitational coefficient, bake at 425 degrees for 45 minutes or until a toothpick slides out easily, then it's Walks * Hits all divided by Innings Pitched...then go to the next Sunday and BAM! you will meet someone on that day that knows when Easter is.
See? Easy.