The phrase "Thank God It's Friday" or "TGIF" appears to have begun at the University of Missouri-Columbia in 1934.
http://fridays.mediaroom.com/index.php?s=faqs
T.G.I. Friday's® Forty Years of Fun Facts
In 1965, Alan Stillman founded the first Friday's® restaurant in New York City.
According to Newsweek and The Saturday Evening Post, the opening of the first Friday's restaurant heralded the dawn of the singles age.
Friday's restaurants have been the employer of several well-known celebrities - Kathy Mattea, Sean Patrick Flannery of "Young Indiana Jones" and Brad Garrett of "Everybody Loves Raymond".
Friday's restaurants have a long history of innovation, including being credited with:
Naming 'happy hour'.
Inventing the Long Island Iced Tea and Loaded Potato Skins.
Popularizing frozen and ice cream drinks.
Pioneering non-alcoholic Smoothies and Flings in honor of the 1984 Summer Olympics in Los Angeles.
(Some of these are not correct - ed.)
16 December 1937, Lima (Ohio) News, pg. 23, col. 5:
The "Thank-God-It's Friday" club, organized by students at the University of Missouri three years ago, has spread to other colleges and shows signs of becoming a national collegiate organization.
(...)
The club was organized to provide week-end relaxation from studies. Its organizer was George Hilton, of Dearborn, Mich., a student in the Missouri school of journalism. It all began when Hilton walked into a delicatessen near the school, sat down in a chair called for a glass of beer and exclaimed: "Thank God it's Friday."
A group of students thereupon decided to celebrate the release from weekly class routine. They have met regularly since for an informal evening of beer drinking and singing.
12 November 1939, Los Angeles Times, pg. 6:
COLUMBIA (Mo.) Nov. 11 (U.P.) The Thank God It's Friday Club of the University of Missouri has stared its sixth year. Organized by George Hilton, a Detroit student in the school of journalism, the club meets Friday nights to celebrate the end of another school week.
13 November 1941, Marion (Ohio) Star, pg. 19, col. 4:
OHIO STATE'S TGIF CLUB
SET FOR HOMECOMING
(Trademark)
Word Mark
T.G.I. FRIDAY'S
Goods and Services
IC 042. US 100. G & S: RESTAURANT AND LIQUOR BAR SERVICES. FIRST USE: 19650315. FIRST USE IN COMMERCE: 19700530
Mark Drawing Code
(1) TYPED DRAWING
Serial Number
72371156
Filing Date
September 21, 1970
Current Filing Basis
1A
Original Filing Basis
1A
Change In Registration
CHANGE IN REGISTRATION HAS OCCURRED
Registration Number
0925656
Registration Date
December 14, 1971
Owner
(REGISTRANT) EUROMART, INC. CORPORATION NEW YORK 1152 1ST AVENUE NEW YORK NEW YORK 10021
(LAST LISTED OWNER) TGI FRIDAY'S OF MINNESOTA, INC. CORPORATION BY ASSIGNMENT MINNESOTA 7540 LBJ FREEWAY, STE 100 DALLAS TEXAS 75251
Assignment Recorded
ASSIGNMENT RECORDED
Attorney of Record
SHANNON T VALE
Type of Mark
SERVICE MARK
Register
PRINCIPAL
Affidavit Text
SECT 8 (6-YR). SECTION 8(10-YR) 20020219.
Renewal
2ND RENEWAL 20020219
Live/Dead Indicator
LIVE
(Trademark)
Word Mark
EVERYONE COULD USE MORE FRIDAY'S
Goods and Services
IC 043. US 100 101. G & S: Restaurant and bar services
Standard Characters Claimed
Mark Drawing Code
(4) STANDARD CHARACTER MARK
Serial Number
78439318
Filing Date
June 22, 2004
Current Filing Basis
1B
Original Filing Basis
1B
Owner
(APPLICANT) TGI Friday's of Minnesota, Inc. CORPORATION MINNESOTA 4201 Marsh Lane Carrollton TEXAS 75007
Attorney of Record
Shannon T. Vale
Prior Registrations
1476290;2122280;2126217;AND OTHERS
Type of Mark
SERVICE MARK
Register
PRINCIPAL
Live/Dead Indicator
LIVE

