I was reading this below and I had a question: http://mathforum.org/dr.math/faq/faq.calendar.html
Take a look under "The Key Value Method" where it says "A remainder of 0 corresponds to Saturday, 1 means sunday, etc."
It’s rough to start a week on Saturday. What adjustments would be necessary to have a remainder of 0 associated with Sunday? (This might allow a mnemonic of Nun-day, One-day, Twos-day, Wednesday, Fours-day, Fives-day, Saturday.)