why are you making the choice to place leading zeroes on your years?
blushes
So I don't know if the concept is explained in more details elsewhere, but I think it's clearly an integral part of their communication.
to be clear, having read through their website, I think what they're doing is great, and this isn't a criticism
That's the kind of programming that makes you reluctant to put anything into it.
Not using leading zeros seems fine if you're using AD near it to indicate that it's not 1942.