“After Monday and Tuesday, even the calendar says WTF”

“After Monday and Tuesday, even the calendar says WTF” is a jocular saying that has been printed on many gift items, such as posters, buttons and T-shirts. The “WTF” stands for “Wednesday-Thursday-Friday,” or course, and not “What The Fuck.”
 
“A quote from a friend: After Monday and Tuesday, even the calendar says WTF” was cited on Twitter on September 19, 2009. The saying became very popular by November 2009.
 
 
Twitter
Ayush Agarwal
‏@yush  
A quote from a friend: After Monday and Tuesday, even the calendar says WTF
7:47 PM - 19 Sep 09
 
Twitter
Sarita Tanwar‏
@SaritaTanwar  
Come to think of it…after monday and tuesday even the calendar says W T F
10:56 AM - 31 Oct 09
 
Twitter
sasha martinengo‏
@F1sasha  
Fact of Life:
After Monday and Tuesday even the calendar says W T F!!!!!
1:04 AM - 16 Nov 09
   
Yahoo! (Canada) Answers
November 23, 2009
Even after Monday and Tuesday the calendar says W T F?
Is this just something clever somebody made up lol or what…..why would EVEN the calendar say wtf
 
11even.net
After Monday and Tuesday even the calendar says “W T F”
2009 November 24
 
Facebook
I never realized that after Monday and Tuesday, the calendar says W T F.
(Joined Facebook on November 26, 2009.—ed.)
 
Facebook
I realized that after Monday and Tuesday, even the calendar says W T F.
(Joined Facebook on December 5, 2009.—ed.)
 
Billboard
Top 20 Tweets of the Week 5/1/10
By Billboard Staff | May 01, 2010 10:00 AM EDT
(...)
@dannygokey : A fact of life- After Monday & Tuesday even the calendar says W T F….