Free Anniversary Dinner

RAY: Well, it turns out that the calendar exactly repeats itself every 28 years, so if, in fact, they had gotten married on a Sunday, then it would be Sunday now. So he knew they were lying because 28 years ago, it had to also have been a Wednesday, and it couldn't have been a Sunday.

TOM: Wow.

RAY: Yeah, I know.

[ Car Talk Puzzler ]