For one thing, Doc never got to set the clock, so we couldn’t have seen it in the film. That’s why Marty ends up back in time, on the “red letter date” of November 5th 1955 (the day Doc Brown hits his head on the toilet and wakes up with the vision of the Flux Capacitor).

Here’s Doc saying how far he’s going into the future:

See there. Twenty Five Years To Be Exact. Damn straight. But…

Presuming he was going exactly twenty-five years into the future (can we presume that though, can we really?) he would have gone to October 26th. Check it:

That’s from when Einstein (the dog) went one minute into the future. Oh, and even at the end when Doc does go to the future, he’s heading for “about thirty years” which could mean anything. See you there though…

So…right year, wrong date. Fucking cool though. Hopefully I won’t get sued for using these pictures…and if I do, maybe I can pay the legal fees by doing paid public speaking on Why It Might Be Necessary To Ignore The Opening Of Back To The Future Part II In Order To Fully Enjoy The Sequels, And Why In Doing So You’ll Enjoy Them More, You’ll Even Enjoy ZZ Top’s Appearance In Part III When They Were Allowed To Keep Their Twirly Guitars When Huey Lewis Wasn’t Allowed To Keep His Mullet.

“Run For It Marty!”

“Marty! I didn’t invent the time machine for financial gain. The intent here is to gain a clearer perception of humanity – where we’re going, where we’ve been, the pitfalls and the possibilities, the perils and the promise. Perhaps even an answer to that universal question: ‘Why?’”
- Dr. Emmett L. Brown, Back To The Future II, 2015