1.  Take the last two digit of the year you were born, call it A
2.  Divide A by 4 and discard the remainer, call it B
3.  Pick the day of the month you were born, call it C
4.  Find the month key value using the code, but subtract 1 for January or February of a leap year, call it D
(For our purposes a leap year is a year that is evenly divisible by 4, 1984 for example but not 1983)
 

J	F	M	A	M	J	J	A	S	O	N	D
1	4	4	0	2	5	0	3	6	1	4	6

6. Find A+B+C+D
7. Divide by 7 and take the remainder. The answer gives you the day you were born:
(0 Saturday, 1 Sunday, 2 Monday etc..)