When my oldest was in daycare, hubby and I both worked shifts, and so we only needed 2-3 days per week. Our dayhome required us to pay for 5 days/week, so we always used 4 days, and used the extra day to study, work OT, run errands, clean, sleep if we were coming off nights, etc. Rarely we sent her all 5 if we had big jobs to do, like a reno.