“Why don’t you eat fish on Thanksgiving?”/“Because Thanksgiving never falls on a fry day.”

People usually eat turkey—and not fish—on Thanksgiving, and there’s a riddle:
 
Q; Why don’t you eat fish on Thanksgiving?
A: Because Thanksgiving never falls on a FRY-day.
   
The joke has been cited in print since at least 2006.
   
“What day does an Easter egg hate the most?”/“Fry-day” and “What’s the best day to eat bacon?”/“Fry-day” are other “Fry-day” riddles.
     
   
Brownielocks—Thanksgiving Jokes and Riddles (November 17, 2006)
1.  Why don’t you eat fish on Thanksgiving?
Because Thanksgiving never falls on a Fry Day (Friday).
       
Google Groups: alt.badgers
Happy for the Giving Thanks day, fraunlevin!
Drew
11/22/06
(...)
Why don’t you eat fish on Thanksgiving?
Because Thanksgiving never falls on a FRY-day.
 
Matchdoctor
Short Thanksgiving Jokes
posted 11/25/2008 8:13:58 AM
(...)
Why don’t you eat fish on Thanksgiving?
Because Thanksgiving never falls on a FRY-day.
 
Wonderful Wonderblog
Tuesday, November 25, 2008
Thanksgiving Jokes
(...)
Why don’t you eat fish on Thanksgiving?
Because Thanksgiving never falls on a FRY-day.
 
Twitter
Ohio Virtual Academy
‏@OHVA_K12
Why don’t we eat fish on Thanksgiving?
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because Thanksgiving never falls on Fry-Day!
9:21 AM - 24 Nov 2010
 
Twitter
B.Ta
‏@iRbEEry
why dont people eat fish on thanksgiving? because thanksgiving never falls on a FRY-day!!! haha happy thanksgiving to all
2:26 PM - 25 Nov 2010
 
Twitter
Denise Whelan
‏@landof6and7
Why don’t we eat fish on Thanksgiving?  Because it doesn’t fall on a FRY-day.
6:31 AM - 20 Nov 2011