Like the title says, I'm trying to remember the name of a book or short story I heard of in a podcast once.

The story revolves around a fortune teller who tells people that he can see into the future, but when people pay for their fortune, the teller says that he can only see one year into his own future, and always tells them "In one year I will still he working here at this carnival." However, one day he sees the end of the world in his vision and tries to warn people about it.

I remember the podcast mentioning that the author is a big name in sci-fi writing. Thanks in advance, I've been trying to remember the name for hours