Until.......by

The difference between by and until...I often hear these words used incorrectly....here's how to use them properly:

I have to turn the report in BY Friday.
I have UNTIL Friday to turn the report in.

To summarize, notice we state what we have to do BY what day, and on the other hand, we have UNTIL what day to complete what we have to do...make sense?? Good!!
(Phrasal Verb: Turn in means deliver)