Dear Friends,
you have very interesting discussion here, let me add one more example of American English usage:
I woke up this morning and thought, “TGIF!” I have been looking forward to the weekend and all I need to do is to get through one more day of work.
TGIF – “thank goodness it’s Friday”; a phrase used on Fridays to show that one is happy that the weekend is coming
* This week has been difficult, but this weekend should be a lot of fun. TGIF!
BR
Golubev Oleg