Angel,
The answer is a clear YES, you can celebrate a birthday, even if you are off by a few days!
So when we travel to Walt Disney World, we are never able to be there during our two daughters mid-November birthday dates, due to school being in session. But because we are usually there just before their actual birthdays, so we pick a different date for each of them to celebrate their birthdays. They get their birthday celebration button from our resort desk, and they get to be the birthday girl for the day!
BUTTON TIP: When your cast member is giving you the celebration button, ask them for a quick favor. After they write his name on the button, ask if they could put a piece of clear tape over it. The marker writing can sometimes rub off, but the tape keeps it intact. Magic preserved!
Don't feel that he can wear the button only on the one day you are having serve as his birthday. Frankly, I think the whole trip should be his birthday celebration, don't you?
I would also recommend that you call the reservations line (407-939-7756) and ask them to note the birthday. If you want to go further, there are tons of great birthday celebration packages available via
Disney Floral & Gifts.
I hope that this helps! Write me back if you want some other celebration ideas!
Have a Magical Vacation!