“The past, the present, and the future walk into a bar…” (bar joke)

“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” A popular English grammar bar joke is:
 
“The past, the present, and the future walk into a bar. It was tense.”
 
The joke has been cited in print since at least 2009 and has been printed on many posters.
 
 
Twitter
Anne
‏@miss_chanandler
“past, present and future walk into a bar. it was t e n s e.” ... brilliant 😉 nighty night, every1.
4:58 PM - 13 May 2009
 
reddit
Past, present and future walk into a bar. It was tense. (self.funny)
submitted August 29, 2009 by 300zedex to /r/funny
 
Hummings of a Happy Hurkle
Sun 30 Aug 2009
A few puns…
Posted by Happy under Fun
Past, present and future walk into a bar. It was tense.
 
Google Books
Supernormal:
Science, Yoga, and the Evidence for Extraordinary Psychic Abilities
By Dean Radin
New York, NY: Deepak Chopra Books (Random House, Inc.)
2013
Pg. 109:
Past, Present, and Future walk into a bar at the same time. It was tense.
 
Google Books
The Everything Big Book of Jokes:
Hundreds of the Shortest, Longest Silliest, Smartest< Most Hilarious Jokes You've Never Heard!

By Evan C. Thomas
Avon, MA: Adams Media
2014
Pg. 218:
THE PAST, PRESENT, AND FUTURE walk into a bar. It was tense.
 
YouTube
#WorstJoke: Past, Prestent, and Future Walk Into a Bar…
Greenpeace USA
Published on Feb 9, 2015
Violet Crumbine know that no matter how bad your worst joke may be, drilling for oil in the Arctic is worse.