Husband picked up a day of work on the day of my birthday party!

We just bought a house and a new car and we got a little behind on small bills a few months ago. We are now all caught up but today he calls to tell me that he is working tomorrow which is my birthday party. I asked him if he told his boss that he couldn't work because of it and he says no he didn't that he figured we needed the money. I am fuming that he didn't even think to run it by me before deciding to work on his day off. Thoughts?!