“What do you call an empty hot dog?/“A halloweenie.”

A Halloween hot dog riddle is:
 
Q: What do you call an empty hot dog?
A: A hollow weenie.
 
“WHY IS TODAY LIKE AN EMPTY HOT DOG? (...) BECAUSE IT’S HALLOWEENIE!” was printed in “The Berrys” newspaper comic strip on October 31, 1949. “Q—What do you call an empty hot dog? A—A Halloweenie” was published in a 1972 newspaper.
 
 
31 October 1949, St. Louis (MO) Star-Times, “The Berrys” (comic strip), pg. 25, cols. 3-5:
WHY IS TODAY LIKE AN EMPTY HOT DOG? (...) BECAUSE IT’S HALLOWEENIE!
 
30 October 1972, Akron (OH) Beacon Journal, “Mini Jokes,” The Mini Page, pg. 3, col. 1:
Q—What do you call an empty hot dog?
A—A Halloweenie.
Vanessa Gerdes, 2815 Seventh st., Cuyahoga Falls
 
26 December 1974, Chicago (IL) Tribune, “Why kids get blues after Christmas Day” by Jack Mabley, sec. 1, pg. 4, col. 2:
“What do you call an empty hot dog?” I give up. “A Halloweener.”
 
28 October 1986, Philadelphia (PA) Daily News, pg. 40, col. 5:
A Halloween Joke
Q: What do you call an empty hot dog?
A: A Halloweener
             
Google Groups: alt.humor
Halloween
Keith Sullivan
10/25/99
(...)
Q. What did the Butcher say to me when he gave me an Empty Hot-dog?
A. Have a Hollow Weenie.
 
Google Groups: alt.humor.puns
Spooky Puns from Stan Kegel
Bob C.
10/30/99
(...)
“What do you call an empty hot dog?”
“A hollow weenie.” (By Richard Lederer and P. C. Swanson).
 
Google Groups: rec.humor
PUNS SPOOKEN HERE
Nancy M. Carson
10/22/00
-What do you call an empty hot dog?
A hollow weenie.
 
Google Books
Puns Spooken Here:
Word Play for Halloween
By Richard Lederer
Illustrations by Jim McLean
Lyton, UT: Wyrick & Company
2006
Pg. 11:
You may well have heard the seasonal prey upon words “What do you call an empty hot dog?” Answer: A hollow weenie.
 
Twitter
 Fred van West 
‏@azpunster
@MrsAtwood @Free_Spirit55 what do u call an empty hot dog? A hollow weeny 😊
4:26 PM - 6 Oct 2009
 
Twitter
Mike Grigg
‏@wulfricblack
What do you call an empty hot dog?
A hallow weenie.
2:28 PM - 28 Oct 2009