Timeline 34 was a timeline created when Marty McFly traveled from June 14, 1931 to June 13, 1931.
- Saturday, June 13
- Sunday, June 14
- 1:51 a.m.: Doc is saved and Officer Danny Parker is demoted and Betty leaves him thus Jennifer isn't born thus Marlene and Marty Jr. aren't born, thus Marty III isn't born.
- 6:00 - 8:00 a.m.: Arthur is dropped off and stays in Hill Valley to meet Sylvia Miskin so that Marty (under the alias "Michael Corleone") is born.
- 9:00 a.m.: Marty and Doc go to 1986. This creates Timeline 35, which begins at Doc and Marty's entry point on May 14, 1986.
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