"Sonunda cuma!" Translation: Finally it is Friday!
Finally it's Friday - correct & I'm pleased that Duo is now accepting contracted English words.
I am still working on the changing of American spellings to the Queens English with the help of other learners. Duo can test my resolve & will lose.
I have inherited English tenacity & Turkish Cypriot resolve (yeminliyim) to do something. It's in my DNA.