When in the 1960s did stores start opening on Sunday?

Many stores in the United States began opening on Sundays in the 1960s as a response to changing social norms and consumer demand. The trend gained momentum after the passage of legislation like the Sunday Sales Act in various states, which relaxed restrictions on Sunday shopping. While specific dates varied by region, the movement gained significant traction throughout the decade, particularly in urban areas. By the late 1960s, Sunday shopping became increasingly common, paving the way for the retail landscape we see today.