My son was born Dec 21st, so I know how it is! He just turned 11- over the years we have offered to do a 'half birthday party' in July, but he has NEVER wanted one! He says he likes having his birthday in the winter.
Usually school lets out for the holidays on the weekend before his birthday and that is when we do the party. When he was little, we had more kids (it's hard not to invite everyone when the kids are little and the classes are small) but the last couple of years, it has been just a few good friends- I think we had 7 boys total this year.
We have just taken the boys for pizza and a movie, have gone to a local ice cream parlor, had a Nightmare Before Christmas theme party where we played Halloween games and everyone wore their Halloween costumes (that one was a huge hit) and this year- a sleepover with movies and the Wi.
Over the past few years, my son has been invited to some lavish parties. We just can't afford it and I talked with him about it, and he was really ok with it. We have always had a GREAT time with our homemade parties. Next year, we are thinking of taking him to a local ice cream parlor where they have a giant 12 scoop sundae called THE TROUGH and letting all the boys eat their way through it.
Lol, boys are easier to please than girls in some way! But doing the party the weekend right BEFORE his birthday lets the kids celebrate being out of school and gets the party done before Christmas is really geared up. That's how we do it- good luck!