According to Chick Fil A, “Our founder, Truett Cathy, made the decision to close on Sundays in 1946 when he opened his first restaurant in Hapeville, Georgia. Having worked seven days a week in restaurants open 24 hours, Truett saw the importance of closing on Sundays so that he and his employees could set aside one day to rest and worship if they choose — a practice we uphold today.” 

SIMPLE SOLUTION FOR THE PROBLEM ABOVE: MAKE SHIFTS FOR THE EMPLOYEES

Is it just me or does everybody crave Chick Fil A on Sundays? So that is why Chick Fil A should be open on Sunday.