also, the 52 cards in the deck symbolize the 52 weeks in a year, and if you add all the cards together, including court cards, it equals 365 for the 365 days in a year
there was a nice little article in david blaines book with a few facts that i'll try to recall...
52 cards-52 weeks
add all equals 365-365 days
13 of any suit-number of lunar cycles in a year
4 suits-4 seasons
thats all i can remember right now