“Dawn” is a brand of dishwashing liquid owned by Procter & Gamble. “Tough on grease, soft on hands” is a trademarked slogan from 1994.
   
There are “Greece” puns. “Why aren’t Greeks morning people? Because Dawn is tough on Greece! Good night” was posted on Twitter by Scott Waldman on August 15, 2016. “Why do people who live in Athens hate mornings? Because Dawn is tough on Greece” was posted on Twitter by Gwen Hartzler on May 3, 2019. “Why don’t people get up early in Athens? Because Dawn is tough on Greece” was posted on Reddit—Jokes on June 21, 2019.
   
     
Wikipedia: Dawn (brand)
Dawn is a brand of dishwashing liquid owned by Procter & Gamble. Introduced in 1973, it is the best-selling brand of dishwashing liquid in the United States. Besides being used for dishwashing purposes, Dawn products are also used to remove grease from other items, such as animal fat spilled onto highways, and oil on animals, such as during the Exxon Valdez and Deepwater Horizon oil spills.
       
Twitter
Scott Waldman
@lidobeach
Why aren’t Greeks morning people? Because Dawn is tough on Greece! Good night.
12:32 AM - 15 Aug 2016
   
Twitter
Crips!!
@Trilliam_Yeats
Why are Greeks not morning people?
Because Dawn is tough on Greece.
12:33 AM - 5 Nov 2018 from Pleasant Hill, CA
   
Twitter 
insane puns
@insane__puns
the greek army is very strong at night
but dawn is tough on greece
6:00 AM - 10 Nov 2018
   
Twitter
daddytech
@daddytech
@CharlesTrippy Athenians hate mornings because Dawn is tough on Greece.
4:45 PM - 3 May 2019
   
Twitter
Gwen Hartzler
@Gwen_Hartzler
Why do people who live in Athens hate mornings?
Because Dawn is tough on Greece.
😉
11:40 PM - 3 May 2019
 
Reddit—Jokes
Posted by u/ragamuffinkingblog May 4, 2019
Athenians hate mornings.
Because Dawn is tough on Greece.
   
Reddit—Dadjokes
Posted by u/malhovic June 9, 2019
People in Athens hate getting up early
...because Dawn is tough on Greece.
   
Reddit—Dadjokes
Posted by u/you_buy_this_shit June 17, 2019
People in Athens hate getting up early
Because Dawn is tough on Greece
   
Reddit—Jokes
Posted by u/undeleted-error_76 June 21, 2019
Why don’t people get up early in Athens?
Because Dawn is tough on Greece
COMMENTS
Drmiddos
But if it’s warm, the people will get up oily
J-A-G-S
Golden Dawn is even tougher on Greece
Its-Dave
For those who don’t get it: Golden Dawn is an ultranationalist, far-right political party in Greece.
 
Facebook
Jokes
June 21, 2019 at 7:26 PM ·
Why don’t people get up early in Athens?Because Dawn is tough on Greece
 
Reddit—Cleanjokes
Posted by u/mk3211226 June 30, 2019
Why don’t people get up early in Athens?
Because Dawn is tough on Greece. 😆
 
(Trademark)
Word Mark TOUGH ON GREASE MILD ON HANDS
Goods and Services (CANCELLED) IC 003. US 001 004 006 050 051 052. G & S: DISHWASHING DETERGENT AND HAND SOAP. FIRST USE: 19900301. FIRST USE IN COMMERCE: 19900301
Mark Drawing Code (1) TYPED DRAWING
Serial Number 75610814
Filing Date December 22, 1998
Current Basis 1A
Original Filing Basis 1A
Published for Opposition May 30, 2000
Registration Number 2478902
Registration Date August 21, 2001
Owner (REGISTRANT) COLGATE-PALMOLIVE COMPANY CORPORATION DELAWARE 300 Park Avenue New York NEW YORK 10022
Attorney of Record FELICIA G. TRAUB
Type of Mark TRADEMARK
Register PRINCIPAL
Live/Dead Indicator DEAD
Cancellation Date July 10, 2003
   
(Trademark)
Word Mark TOUGH ON GREASE SOFT ON HANDS
Goods and Services IC 003. US 001 004 006 050 051 052. G & S: DISHWASHING DETERGENT. FIRST USE: 19940331. FIRST USE IN COMMERCE: 19940331
Mark Drawing Code (1) TYPED DRAWING
Serial Number 75655018
Filing Date March 5, 1999
Current Basis 1A
Original Filing Basis 1A
Published for Opposition May 30, 2000
Registration Number 2508462
Registration Date November 20, 2001
Owner (REGISTRANT) COLGATE-PALMOLIVE COMPANY CORPORATION DELAWARE 300 Park Avenue New York NEW YORK 10022
Attorney of Record Nadine P. Flynn
Prior Registrations 1282038
Type of Mark TRADEMARK
Register PRINCIPAL
Affidavit Text SECT 15. SECT 8 (6-YR). SECTION 8(10-YR) 20110118.
Renewal 1ST RENEWAL 20110118
Live/Dead Indicator LIVE