User blog comment:Dagostino/Character Pages/@comment-4649443-20121010054102

I thought of another thing that should change: Percy's birthdate(and anyone else who wasn't born in the past). The birthdate says his birthday is August 18, 1993, and I think the more sensible year would be 1991 because Lightning Thief came out June 2005, and since Lightning Thief brings it right up to the last day of camp(mid-August), 2004 makes more sense. And of course since Percy's birthday is a few days after camp, it means he was turning 13 that year and 2004-13=1991.