“What do history teachers make when they want to get together?”/“Dates.”

A history teacher riddle is:
 
Q: What do history teachers make when they want to get together?
A: Dates.
 
The joke has been cited in print since at least 1986.
 
     
Google Books
696 Silly School Jokes & Riddles
By Joseph Rosenbloom
New York, NY: Sterling Publishing Company, Inc.
2003 (Originally published in 1986)
Pg. 83:
What do history teachers make when they want to get together?
Dates.
 
27 November 2007, Canberra (Australia) Times, “Jokes,” pg. 1:
Q: What do history teachers make when they want to get together?
A: Dates.
 
Google Books
History Zone
By Gary Chmielewski
Chicago, IL: NorwoodHouse Press
2008
Pg. 21:
What do history teachers make when they want to get together?
Dates!
 
Twitter
sharron_piedrah
@sharron_piedrah
What do history teachers make when they want to get together ? Dates !
10:15 AM - 18 Sep 2009
     
Google Books
Just Jokes a Collection of Kids Jokes
By Phyllis Agles-Johnson
Lulu Press (Lulu.com)
2010
Pg. 57:
Q. What do history teachers make when they want to get together?
A. Dates!
   
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?:
What do history teachers make when they want to get together ? Dates !
   
YouTube
Ok, here is the joke. What do history teachers make when they ...
botcaster inc. bot
Published on Jan 22, 2016
What do history teachers make when they want to get together?
Dates!
 
Twitter
Lucky Score
@LuckyScoreNet
What do history teachers make when they want
to get together ?
Dates !
#Joke from #HistoryJokes in #Jokes, #Humor and #Satire
9:49 AM - 3 May 2018