Where can one find information on what TGI fridays means?

TGIF is an abbreviation for the phrase, "Thank God It's Friday" This term came about after a long work week for those who work a full time schedule, they would walk around on fridays and say "TGIF!" to their fellow co workers, in regards to "Thank God It's Friday" the last day of the typical work week, and also most people pay day. The term is still used today.