

•1863
the city was founded by Quentin Trembley, 8 ½ th President of the United States.
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•July, 4th 1982
Thirty years before the arrival of twins in Gravity Falls, it happened something, and precisely on that day, but what?
•May, 2th 1995
The owners of Dusk2dawn, the Duskerton, die from a heart attack caused by the Rap of adolescents.
•1997
There was a costume shop on the site of the Stan's funfair. Today, it is gone. May be this was just a funny story for the episode (s1x09).
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• Late summer 1999
Birth of Mabel and Dipper.
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•2002
Grunkle Stan bought the wax statues.
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• Summer 2012
Dipper and Mabel spend holidays in Gravity falls.
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Not sure
• Around 1975
The author started his investigation about gravity falls.
•June, 18th 1980
The author started to write the third journal.
• Around June 1981
Mc Gucket decided to quit his collaboration with the author, and wanted to forget what he had done with his proper invention. 22 days after, he created the society of the blind eyes.
• Winter 1981
Mc Gucket became a ruined man. Mabel and Dipper traveled in the time until this moment, and they appeared in front of the (mystery) shack.
