Daisy,, you might want to add something here............i did mine and it came out a year short because my birthday is not yet.......perhaps the age you WILL be this year,, then it adds up.. ??
OH, your BD ok BW, then add your date when your BD is, then do the math :)
Mine work fine as my BD has come and gone.

So instead of 62, do 63 as that what your age will be on your B/D this year :)

So, Add 63 and 1955 and you get what?
Its just simple math.
But neat tho? right Sosa?
Yes, it is.