nope, it's today afaik
check the post where he writes about actually receiving the pizzas

e: http://blockchain.info/tx/a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d
date of the 10.000 btc payment is 2010-05-22 (iso date format to avoid doubts)