<P> TGIF may refer to: </P> <Ul> <Li> Thank God It's Friday (also Thank Goodness It's Friday), a common expression </Li> </Ul> <Li> Thank God It's Friday (also Thank Goodness It's Friday), a common expression </Li> <Ul> <Li> TGIF (ABC), a former two - hour programming block on the American television network ABC </Li> <Li> "Last Friday Night (T.G.I.F.)," a 2011 single by Katy Perry </Li> <Li> "T.G.I.F. (Thank God I'm Fresh)", a song from the Kid Cudi album Man on the Moon: The End of Day </Li> </Ul>

Where did the phrase thank god it friday come from