June 8, 2013 @ Wikipedia
A blue law is a type of law designed to restrict or ban some or all Sunday shopping for religious standards, particularly the observance of a day of worship or rest. Blue laws may also restrict or ban sale of certain items on specific days, most often on Sundays in the western world. Some Islamic nations may ban on Fridays, and Israel often on Saturday Sabbath. Blue laws are enforced in parts of the United States, as well as some European countries, particularly in Austria, France, Germany, Switzerland, and Norway keeping most stores closed on Sundays.