“Why is Christmas just like a day at the office?” (joke)

One of the most popular of all Christmas jokes is:
 
“Why is Christmas just like a day at the office?
You do all the work and the fat guy with the suit gets all the credit.”
 
The joke has been cited in print since at least 1994. “Why is Christmas just like your job?” (a slightly different introduction line) became popular in 2013.
 
   
Google Groups: rec.humor
Canonical List Of Holiday Humor 1/3
Yet Another Canonical Compiler
12/15/94
(...)
Why is Christmas just like a day at the office?
You do all the work and the fat guy with the suit gets all the credit.
   
HumourNet
19 DEC 96
(...)
SUBJ: Christmas Sig
Christmas is like a day at the office:
You do all the work, and the fat guy in the suit gets all the credit.
   
Google Books
The American Legion
Volumes 152-153
2002
Pg. 60:
Why is Christmas just like a day at the office? You do all the work and the fat guy in the suit gets all the credit.
     
Google Books
Christmas Wishes:
Inspiring Sentiments for the Festive Season
By Tom Burns
New York, NY: Barron’s Educational Series, Incorporated
2003, 2004
2004
Pg. ?:
Why is Christmas just like a day at the office? You do all the work and the fat guy with the suit gets all the credit.
 
Google Books
Pretty Good Joke Book
By Brian Becker
Minneapolis, MN: HighBridge Company
2005
Pg. 177:
Why is Christmas just like a day at the office? You do all the work and the fat guy in the suit gets all the credit.
 
Twitter
Dave Bastian
‏@DaveBastian
you do all the work, and some fat guy in a suit gets all the credit.
1:14 PM - 18 Dec 2007
 
Twitter
Linda Knight Crane
‏@knightcrane
How is Christmas like your job? You do all the work & the fat guy in the red suit gets all the credit. HO HO HO!
9:54 AM - 10 Dec 2009
 
Twitter
LianneR5•.•.
‏@Lianne_JLS_1D
#ChristmasJokeTime Why is Christmas time just like your job?..... You do all the work and the fat guy with the suit gets all the credit….
12:57 PM - 13 Dec 2013
 
Twitter
Jakey
‏@ScreamerJaker
@grahamlfc08 Why is christmas just like your job?
Because you do all your work and the fat guy with the suit gets all the credit hahaah
11:41 AM - 25 Dec 2014