Daddy's birthday is coming up but so is Christmas

I(38F) have been in a new D/s relationship with Sir(43M) for a month now. Things have progressed quickly and he collared me with a beautiful rose gold choker 2 weeks ago. His birthday is coming up and I want to get him something meaningful and show him how much I appreciate him. I also want to remind him of my bratty side that he loves so much. I need some ideas of what to get him.

Also, do I go bigger for his birthday or get him something smaller and go for something more grand for Christmas? Ugh this is stressing me out. Please help! TIA