Oh yes, I remember him retiring once as well. After Dave made the NBC switch in 1993, I slowly stopped watching. By that time Conan was on and I found him more funny. Speaking of timeline changes. I asked my grandmother whom is 89, what year Nelson Mandela died. She replied, "Oh I remember that so well! He died back in 1994. His wife was president for a short time after that." You have to understand my grandmother, she has never been on the internet, she doesn't even own a computer and still has a landline. When I told her that the news said Mandela died in 2013, she laughed and said well they're wrong.
So there you have it, add another person who remembers Mandela dying in 1994. Cha-ching...