evidence: A new law could force Chick-fil-A to stay open on Sundays [...] Fast-food chain Chick-fil-A may soon be required to open on Sundays. [...] According to the restaurant’s website, founder Truett Cathy wanted the original establishment to be closed on Sundays, so he and his workers were guaranteed at least one day off to worship or do what they please. As of now, all Chick-fil-A locations abide by Cathy’s initial intentions, generally operating between 6am and 10pm for six out of the seven days of the week.