In fact, as a stay-at-home mom for the last 10 years, I've had no sense of "Fridays". Everyday was a day spent doing what I wanted to be doing. My husband didn't have traditional "weekends" off anyway, so it was just no big deal.
Now, I work a full time job, Monday to Friday. My children are in childcare all day, Monday to Friday. Now I truly know the meaning of TGIF, "Thank God It's Friday!"