I can't do Sunday. My church schedule is in the mid morning, most races I participate are held on Sundays and, I believe, C&C in general are on Saturdays anyway.
Saturday C&C is perfect for me. C&C in the morning, then a long brunch with family, a few errands to run afterward, and preparing for guest-entertaining or going out with family friends later at night. Hopefully there is a time for napping in between