btw, what's with the leading zero here?
kragen thinks making most of his readers glitch for a second every time they read one of his dates is worth it on order to advertise for the Long Now. Really unfortunate choice, since he often has decent information to share.
However OCTAL (leading zero) prefixing of a text mode number fails on a number of points:
* It's still a fixed register size (5 characters), which will overflow on the year 100000 AD.
* It's confusing, everyone else.
* It's not technically correct. (human behavior)
Truncating to two year digits was confusing because ambiguity. There is no ambiguity if a number encoded in decimal uses precisely the number of characters it needs. That's how normal humans normally write numbers.