Birth year: 1981
1+9+8+1=19 (Arcanum 19)
1+9=10 (Arcanum 10)
1+0-1 (Arcanum 1)
1981+19=2000
2+0+0+0=2 (Arcanum 2)
2000+2=2002
2+0+0+2 = 4 (Arcanum 4)
2002+4=2006
2+0+0+6 = 8 (Arcanum 8)
Etc...........
Or does one simplify completely to obtain the next increment. This leaves out any arcana that fall above 9.
I got the information from here:
http://samaelgnosis.us/kabbalah/index.htm
I just don't know if I'm doing it right. Interestingly, I did both my wives and my own using this method and it perfectly lined up with when we met. It also worked for my parents. So I think I'm doing it right but I though to myself if I simplified completely for the increments I might get a more detailed result.
Thanks and blessings.