I am also doing Disney trips for my kids for their birthdays this year. This will be the first trip for both of them. My dd's bday is mid-July, but I am taking her in early June. My ds bday is early Oct., but we are celebrating his in mid Nov. I would love to be there on the actual days, but that just wasn't an option. The trip is the gift this year - no bday party with friends this year, (on the actual day, we might do pizza or something, but they understand - this is a big deal and they are very excited)
When I take my dd, we are doing breakfast at 1900 Park Fare. When I made my ADR, I was asked if we are celebrating a special occasion. I said we are celebrating her bday, even though it isn't for another month, and the CM said she was still noting we were celebrating a bday.
So go ahead, have fun!!!!!