Linus is Three

Linus,

Today wasn't your birthday. You may have had cake, a party, all your presents and cards, but actually your birthday is tomorrow.

For various logistical reasons your party was today. And you can't have a party without cake and, possibly some presents.

I am going to be away tomorrow - and won't be back until Friday, so rather than attempting to make you wait for presents until later we have let you open then tonight - right before bed. In hindsight that seems rather cruel, but you were very tired and it seems to be okay.