How long did you have to wait from the time of the ultrasound/test till the time you did the reveal?

We had our 16 week u/s and we are doing a cake reveal. So I have to wait 2 days for the bakery to make our cake.

Right before the u/s, DH tried to convince me to find out at today. I thought about it but decided to wait. I'm actually still ok with waiting. I've wanted to do a cake reveal for a long time.