“What is a kangaroo’s favorite year?”/“A leap year.”

A leap year riddle is:
   
Q: What is a kangaroo’s favorite year?\
A: A leap year.
 
The joke was printed in Newsday (Long Island, NY) on May 1, 1988. “What do you get when you cross a kangaroo with a calendar?”/“A leap year” is a similar riddle.
 
       
1 May 1988, Newsday (Long Island, NY), “Smiles,” Kidsday sec., pg. 1:   
What is a kangaroo’s favorite year?
Joke Answer: Leap year. - Ciara DelVecchio, Valley Stream
   
26 February 1989, Newsday (Long Island, NY), “Smiles,” Kidsday sec., pg. 1:   
What is a kangaroo’s favorite year?
Leap year. - Susan Hennessey, Elmont
 
Google Groups: rec.humor
Here’s a real lame kangaroo joke!
Jeff Ochs
8/25/94
Here is a very lame joke I saw on a popsicle stick:
What is a kangaroo’s favorite year?????????????
Leap year!!!
   
Google Books
Playing Possum:
Riddles About Kangaroos, Koalas, and Other Marsupials
By John Jansen and Susan Slattery Burke
Minneapolis, MN: Lerner Publications
1995
Pg. ?:
Q: What’s the kangaroo’s favorite year?
A: Leap year.
   
Google Books
Super Goofy Jokes
By Jacqueline Horsfall
New York, NY: Sterling Publishing Company, Inc.
2004
Pg. 14:
What’s a kangaroo’s favorite year?
Leap year.
 
Twitter
CG
@cherellegoode
What is a kangaroo’s favourite year? Leap Year.
10:50 AM · Dec 30, 2010·Twitter for BlackBerry®
   
Twitter
Bob Lewing
@newplayaoldgame
What’s a kangaroo’s favorite year? Leap year
12:07 PM · Mar 26, 2012·Twitter for BlackBerry®
 
Twitter
Sethy.2018
@sjh_harrison
What is the kangaroo favourite year ?
Leap year .
              Funny 😁
3:22 PM · Oct 3, 2016·Twitter for Windows Phone
 
Twitter
☕ Hotcoco ☕ (CEO OF IT)
@Hxtcock
Whats a kangaroos favorite year?
A LEAP YEAR
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9:30 PM · Dec 9, 2019·Twitter Web App