Birthday Square

Say , your birthday is on 8 June 1998 , then A=08
B=06
C=19
and D= 98

Substitute these values in the table and add them vertically , horizontally or diagonally , they add upto a same sum !

A B C D
C-1 D+1 A-1 D+1
D+1 C+1 D-1 A
B A-2 B+2 C

*This is not a magic square as Birthday and the starting of the year might repeat , as 20 , June .2013