Tired of his marriage, Donald Boyce begins exchanging the odd kiss and soft touch on the hand with his best friend’s wife Molly, all quite innocent until Friday, the nineteenth, when Molly proposes that they have a clandestine rendezvous on Saturday, the twentieth, throwing both of them into a continuous repeat of the nineteenth.

A well-written, early time-loop story, and also one of the first two time travel stories (along with “An Ounce of Prevention”) to appear in The Magazine of Fantasy and Science Fiction.