My husband usually mows on the weekends because he works 6 days and long hours during the week.
Normally he will do it when our son is sleeping. We usually go out together as a family on Sunday mornings, then when we come home, it's nap time for DS and that's when we do some housework.
I clean a little everyday, but usually Saturday morning is my big tidy up. After 3 days of rushing around for work, it's necessary because the house is a pigsty.