Ok, I’m definately going to have to look at this closer after a night’s sleep, but here’s what I’ve come up with so far.
Based on:
Jack saying that he’s gone 100 days without a baseball game.
The time difference of 31min and 20sec between the clock on the island and the clock that was on the rocket.
Oceanic crashed on 9/22/2004 @ 10:15 (Lost Wikipedia)
The date for the survivors on the island would be 12/31/2004. The date off the island would be 2/22/2005. Haven’t thought about any importance or theory yet. We’ll see what a night’s sleep brings.