With our site's "birthday" coming up in 3 days, I thought it would be kind of neat to put a candle on the site logo for the day, because the Mexican hat potential kind of looks like a cake if you don't think about it too hard. Can the SE design overlord (hi Jin) make this happen?
We do not do small design tweaks for things like this. Google might be able to do daily fun doodles, but it would get out of hand we did that here given the number of sites we have (and we keep growing!)
For the birthday celebrations, we're looking for the communities to come together with the initiative to put something together. It isn't really for the purpose of just sending swag just to send swag. We do that for other things already... (: