“Why is Valentine’s Day the best day for a celebration?”/“Because you can really party hearty!”

A heart-based Valentine’s Day riddle is:
 
Q: Why is Valentine’s Day the best day for a celebration?
A: Because you can really party hearty!
 
The riddle was posted to the newsgroup alt.humor.puns on February 14, 2004 and has been printed on many images.
   
   
Google Groups: alt.humor.puns
PUNS of the WEAK 02-14-04
Stan Kegel
2/14/04
(...)
Why is Valentine’s Day the best day for a celebration?
Because you can really party hearty! (Marsha Coleman)
 
Google Groups: My Delhi
cheesy valentine jokes..
roops
4/11/06
(...)
Why is Valentine’s Day the best day for a celebration? 
Because you can really party hearty!
 
Google Books
Grin & Share It!:
More Laugh Lines for Educators
By Diane Hodges
Thousands Oaks, CA: Corwin Press
2008
Pg. 73:
Q: Why is Valentine’s Day the best day for a celebration?
A: Because you can really party hearty!
 
Twitter
Chanda Leary
‏@chandaleary
@MacysInc Why is Valentine’s Day the best day for a celebration?
Because you can really party hearty! #SweetestTweets
6:58 AM - 6 Feb 2010
 
Twitter
Shop The Cats
‏@shoplosgatos
Q: Why is Valentine’s Day the best day for a celebration?
A: Because you can really party hearty!
12:23 PM - 30 Jan 2011
 
Twitter
mohammad irfan
‏@mohammadirfanq
Q: Why is Valentine’s Day the best day for a celebration?
A: Because you can really party hearty!
6:23 AM - 8 Feb 2011
 
Delayed Reaction Lounge
Tuesday, February 7, 2012
WANNA LAUGH?!?!??!
(...)
Q: Why is Valentine’s Day the best day for a celebration?
A: Because you can really party hearty!
 
My Town Tutors
Valentine’s Day Jokes: Top 25 Valentines Day Jokes
Posted on February 12, 2015 by mmolloy
(...)
1. Why is Valentine’s Day the best day for a celebration?… Because you can really party hearty!
 
Google Books
Wimpy Kid Jokes About Love & Valentines!:
The Ultimate Book of Valentines Jokes, Riddles, Fun Trivia, Facts, Puns and More!
By Marcus Stuart
LOL Kids Books
2016
Pg. ?:
Why is Valentine’s Day the best day for a celebration?
Because you can really party hearty!