Back to the Future (1985)

User interface: Delorean
Doc Brown's Delorean is hands down the coolest time machine ever. All that and a sensible user interface. Okay the time control circuits only take Gregorian dates but I'm not going to nitpick - I want one! All you need now is to get 1.21 Gigawatts of power and hit 88mph!

For a full tour of the systems inside a replica Delorean check out this great video from BTTFParts.