Subject: Day of the week
Date: Sat, 29 Mar 1997 20:41:57 +0300
I am desperately looking for mental methods of calculating what day of week it is given an exact date. Impressed by your homepage, i decided to write you and see if you can help.
I've got a lot of equations, but what i am really after is the thought that goes behind finding out day of the week. For example, one formulae that i know of works as follows:
d = (y-1) + Y-1/4 + y-1/100 + y-1/400 + s
That's all fine and dandy, but why on earth are we dividing by those numbers.
Hoping you'd help.
Please mail me on:
thanx for any help.....