I don’t know the exact date, but Clancy turned up on my doorstep on December 15,’07 at about six weeks of age, so we celebrate on November 1st. Well, I celebrate. He seems pretty blasé about the whole thing:
He’s getting a few extra Greenies on his special day, though.

Happy birthday, Clancy.
Damn, you’ve had him 2 years already? Time flies.
Screw greenies, give the cat some tuna.