6 Things You Should Never Buy on a TuesdayThe day of the week you do your grocery shopping can have a surprisingly big impact on the deals you find and the quality of the products you buy. Here are six things you should never buy on a Tuesday. Most Sale Items from the Weekly AdThe vast majority of American grocery stores start their new weekly ad on a Wednesday. You should never buy fresh seafood at the beginning of the week. MilkThis may seem surprising, but Tuesday can be a bad day to buy milk if you are looking for the latest possible expiration date.