Where is my Sunday paper?

An irate customer called the newspaper office, She loudly demanded to know where her Sunday edition was.
"Madam",  said the newspaper staff, "today is Saturday.  The Sunday paper is not delivered until  tomorrow, on SUNDAY".
There was quite a long pause on the other end of the phone, followed by  a ray of recognition as she was heard to mutter,  ....
"Well, shit, that explains why no one  was at church either.