Wrong day

When I bought an expensive sports car, my two sons asked me who would inherit it when I met my demise. I told them that if I passed away on an even-numbered day, the son who was born on an even day would get it. If it happened on an odd day, the one born on the odd day would get it.

A few weekends later, while river rafting with one of my sons, I was tossed out of the boat. As I floated in the rapids, I heard him yelling, "It's the wrong day!"