Happy birthday to Smallsteps.
This isn't the ideal time to prune cherry trees. Pruning in spring, before the buds form on the branches, is ideal. Cherry trees don't live very long. Because they grow quickly, they're not resistant to disease.

I hope Wednesday is a nice day. Outside, you can shelter from the rain with a few tarps. Of course, if it's going to rain heavily, you'll have no choice but to celebrate indoors.