“What time is it when you sit on a pin?”/“Spring time.”

A time riddle is:
 
Q: What time is is when you sit on a pin?
A: Spring time.
 
The joke has been cited in print since at least 2009. “What time is it when you sit on a tack?”/“Spring time” has been cited in print since at least 1968.
   
       
Twitter
Bollywood Sargam
@bollywoodsargam
Time jokes - 501 Joke: What time is it when you sit on a pin? Spring time. .... http://bit.ly/eRH7R
8:00 AM - 3 Aug 2009
       
Twitter
nadine_corkins2
@nadine_corkins2
What time is it when you sit on a pin? Spring time.
4:15 AM - 18 Sep 2009
 
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?:
What time is it when you sit on a pin? Spring time.
 
Twitter
lorraine Jo King
@LahLahBean
#tuesdaytitters
What time is it when you sit on a pin?
Spring time.
5:21 PM - 19 Jun 2018