Really? Well, I didn't allow for multiple answers... Uhh, it also becomes complex with two votes, its much easier for the voting to be balanced out, 8 people voting for 2 out of 4 days each, we could end up with 4 votes each day, I think...
Let's focus on the most convenient day for all first, and possibly I can setup another session additionally. The first race is the 16th remember.