Calculates age from date and date of birth in year/month/day format.
Assumes New Year on Jan. 1.
This version can use two different computation methods:
Please see my explanation of birthdate calculation methods.
Also note that the fixed-length month calculation does not give the exact time elapsed!
Please report any problems with the mail link below, but first make sure you're not just reading something wrong.
This has been yet another web page by Ben Buckner.