They have always been closed on Sundays. They are owned by a religious group. so no big surprise there. I remember when I was a kid and everything was closed on Sundays.
I hate that they are closed on Sunday and would prefer for them to be open 7 days a week. But I respect their choice. We don't need blue laws in this country we just need to let each business choose it's own operating hours.
I work there and let me just say I LOVE getting every sunday off. Plus the food is a really good. :]
I have been working there for over a year, and I am still NOT sick of their food, and I eat it 2-3 times a week as well. :] Its absolutly delicious.