Middle Of The Week

What is it??? Since we started remodeling the house I have had people tell me they will be their the middle of the week. If I'm lucky they will show up on Fri. but sometimes it ends up being Mon. What sense does that make? I had a fellow tell me he would be here to talk to me about my cows and the ration on Monday. He still hasn't come. Oh, by the way, the Monday he was talking about was two weeks ago. What sense does that make? Anyway, I have come to the conclusion that the middle of the week is Friday.