Would like to add my voice to Nikolarun -- Sunday laws are very out of date with regard to the way people live now. As someone who spent many long hours working retail in the US, I can say that working a long Sunday suited me just fine -- I could earn more and attend all of my university classes during the week. I find it hard to imagine a Divine Being would be offended by that. Similarly, being able to get shifts during the week from 3:30PM - 9:30PM in the store (regular retail, not grocery) was really good. How do people earn money after school when everything closes so early?
But if we are to be stuck with limited hours, I would prefer an opening until six, as we never plan our Sunday evening cookout until the last minute -- the weather is far to unpredictable!