I quit at solving the one with "Back to the Future" quiz. I don't know that movie, I searched for answers and tried to put the years I saw but no luck.Anyway, this concept is cool and the theme is presented nicely.
Oh, sorry you were blocked on the "Back to the Future" enigma! The attended answer is 01:20:XX ;)
This is a great movie, I strongly advice you to watch it, it's a classic when speaking about time travel :)
Thanks for your feedback!