My understanding is that is their formal policy. Also, I believe if they have a ticket, it's good (or can be traded without penalty) as long as the ticket is active. Not sure how that might work for those with old non expiring tickets like the handful of 10 days tickets we have. I'll know for sure if a few months.I’ve read many times that Disney doesn’t penalize kids for having a birthday during their visit, so if they’re 2 when they arrive, they’re 2 for the entire trip so far as resorts, tickets and dining go, even if they turned 3 the day after they arrived.