October 26

The following events occurred on October 26.

1985, Saturday

Original timeline

Doctor Emmett Brown calls Marty McFly after midnight to come down to Twin Pines Mall
Marty picks up Doc's JVC recorder and arrives at the mall after 1 am.
Doc unveils his DeLorean time machine.
Doc creates the world's first temporal displacement test at 1:20:00 am, sending his dog Einstein one minute into the future.
At 1:21:00 am, the car reappears and the test is a success.
Doc places another pellet of plutonium in the car.
Libyan terrorists arrive and kill Doc.
Marty escapes in the DeLorean, activating the time circuits, and accidentally travels back to 1955.
The Libyans crash into a photo booth.

Revised timeline

Marty arrives back in 1985 early to save Doc, but the car dies and Marty runs down to the Lone Pine Mall.
Marty watches Doc get shot again and his other self travel back in time.
Marty finds that Doc was wearing a bulletproof vest, as a result of reading Marty's letter to him warning of his death.
Doc drives Marty back to his house.
Doc travels roughly 30 years into the future.
Marty wakes up to find a completely different family and life.
Jennifer Parker arrives.
Doc returns in an improved DeLorean from 2015 and takes them with him.
Biff Tannen watches the DeLorean take off and reach temporal displacement.

Marty arrives back in 1985A (believing he went to the original 1985), he is pursued out of "his" house
Doc finds his alternate reality's double's (Doc-A) lab
Marty is taken to Biff's Casino Hotel
Marty finds his fathers' grave