“My boss yelled, ‘You’ve been late 3 times this week, Do you know what that means?’”(Wednesday joke)

“My boss yelled, ‘You’ve been late 3 times this week, Do you know what that means?’ Apparently, ‘It’s Wednesday’ wasn’t the correct answer” is a jocular work saying that has been printed on several images. The joke was posted on Twitter on October 22, 2010:
 
Boss: This is the 3rd time you’re late this week! You know what that means!!
Employee: That it is Wednesday??
 
“My boss yelled, ‘You’ve been late 5 times this week, Do you know what that means?‘“ is a related joke about Friday
   
 
Twitter
Mo Vlaan‏
@MoVlaan
Boss: This is the 3rd time you’re late this week! You know what that means!!
Employee: That it is Wednesday??
3:55 AM - 22 Oct 2010
   
Twitter
Imke‏
@hedalexatrikru
Teacher: “This is the third time you’re late this week. You know what that means?” Me: “That it’s Wednesday?”
7:14 AM - 28 Mar 2012
 
Twitter
Saucy Kensington‏
@Book_Krazy
Boss: This is the third time you’ve been late for work this week. Do you know what that means?
Me: That it’s only Wednesday
10:19 AM - 7 May 2014
   
24 April 2015, Daily Record (Glasgow, Scotland), “Follow Friday: Saucy Kensington @Book_Krazy,” pg. 21:
Boss: This is the third time you’ve been late for work this week. Do you know what that means? Me: That it’s only Wednesday?
 
Twitter
Jen Jen‏
@JennayyLynn24
“You’ve been late 3 times this week. You know what that means?”
It’s only Wednesday 😀🔫
7:05 AM - 30 Sep 2015
 
Twitter
MachineGunHarry‏
@DukumNukem
Boss: you’ve been late 3 times this week you know what that means?
Me: that it’s only Wednesday
7:32 AM - 16 Dec 2015
 
Google Books
100 Best Jokes:
Family Edition
By various authors
Editions ASAP
2016
Pg. ?:
Boss: This is the third time you’ve been late for work this week. Do you know what that means? Me: That it’s only Wednesday. *
 
Twitter
Diego‏
@diego_the_swiss
“You’ve been late 3 times already this week! Do you know what that means?”
“It’s Wednesday?”
3:56 PM - 11 Apr 2016
 
Twitter
James Mittelsteadt‏
@jamesdeanten
My boss : “James, you have been late 3 times this week. Do you know what that means?”
Me : “Yeah, it’s only Wednesday.”
10:01 AM - 14 Sep 2016