This is a timeline of events in Gravity Falls. The series takes place during 2012.
|Some time 65 million years ago.||Mabel and Dipper Pines are sent back 65 million years and are almost eaten by a dinosaur.||The Time Traveler's Pig|
|1837||Quentin Trembley wins the 9th Presidential Election in the United States of America by a literal landslide.||Irrational Treasure|
|1842||Gravity Falls is founded by 8½th president of the United States of America, Quentin Trembley.||Irrational Treasure|
|1862||Mabel and Dipper travel back in time by 150 years. Fertilia and her family travel on the Oregon Trail.|
Nathaniel Northwest is deemed the founder of Gravity Falls, and tricks the townspeople into building the Northwest Manor.
|The Time Traveler's Pig and Northwest Mansion Mystery|
|1883||Train car that holds Greasy's Diner was made.||Society of the Blind Eye|
|c. 1931||Stan Pines and his twin brother are born.||N/A|
|Late 1930s – early 1940s||Stan Pines' father takes his two sons into the boxing section.||Dreamscaperers|
|1940s||Stan's boxing skills help him save Carla McCorkle. They begin a relationship.||Dreamscaperers|
|1970s||Carla leaves Stan in favor of Thistle Downe.||Boyz Crazy|
|1975||The author of the journals begins to research Gravity Falls and documents his findings in Journal #1.||Tourist Trapped|
|1981||Fiddleford McGucket works as a research assistant to the author in the construction of the Universe portal.||Society of the Blind Eye|
|June 18, 1981||The author begins to write Journal #3 six years since beginning their research on Gravity Falls.||Tourist Trapped|
|1982||The Government takes notice of some odd readings in Gravity Falls, Oregon. These reappear in 2012, when the portal is being opened .|
Fiddleford McGucket founds the Blind Eye Society.
|Scary-oke and Society of the Blind Eye|
|July 4, 1982||The calendar in the hidden room of the Mystery Shack is circled.||Carpet Diem|
|1982-1983||Fiddleford McGucket's mind deteriorates from persistent use of the Memory erasing gun.||Society of the Blind Eye|
|July 13, 1990||Jesus "Soos" Alzamirano Ramerez is born.||Blendin's Game|
|1990-1995||Jeffy Fresh, Byrone, and Rosie are living in Gravity Falls.||The Inconveniencing and Summerween|
|May 2, 1995||Ma and Pa Duskerton die, if the newspapers weren't replaced after their death.||The Inconveniencing|
|August 1996-May 1997||Wendy Corduroy is born.||Double Dipper|
|1997||There is a costume store in the area the Mystery Shack is located, possibly part of the Mystery Shack itself.||The Time Traveler's Pig|
|August 31, 1999||Twins Mabel and Dipper Pines are born.||The Inconveniencing|
|June-July 2002||Gideon Gleeful is born||Blendin's Game|
|July 13, 2002||Soos' twelfth birthday, and he comes to the realization that his father is not coming back to see him. Soos begins to work at the Mystery Shack.||Blendin's Game|
|2002||The wax figures are put into storage. ("We've been waiting 10 years to get revenge on Stan for locking us away.")||Headhunters and Blendin's Game|
|May 2012||The events of Tourist Trapped and The Legend of the Gobblewonker take place.||Tourist Trapped and The Legend of the Gobblewonker|
|June 1-3, 2012||The events of Headhunters take place. The decapitation of Wax Stan took place on a Saturday night during a Waxing Gibbous Moon (June 2) as depicted in the episode.||Headhunters|
|June 4, 2012-June 21, 2012||The events of "The Hand That Rocks the Mabel" through "Little Dipper" occur, including the celebration of Pioneer Day.||Episode guide|
|June 16, 2012||Opening day of Pony Heist. The Pines and Soos go to the movies.||Mabel's Scrapbook: Heist Movie|
|June 22, 2012||Gravity Falls celebrates Summerween, and the events of "Summerween" occur.||Summerween|
|June 23-July 10, 2012||The events of "Boss Mabel" through "The Golf War" take place.||Episode guide|
|June 20, 2012||Dipper takes a closeup photo of Stan's partial tattoo.||Stan's Tattoo|
|June 23, 2012||Dipper takes a photo of Stan's back and partial tattoo. Stan noticed.||Stan's Tattoo|
|June 25, 2012||Dipper takes a photo of Stan's back and partial tattoo.||Stan's Tattoo|
|July 3, 2012||The due date for TK618 to be returned to the Gravity Falls Library.||Stan's Tattoo|
|July 11-July 15, 2012||Mabel prepares for her opera to impress Gabe Bensen.||Sock Opera|
|July 13, 2012||Soos' 22nd birthday. The twins arrange a surprise birthday party and are pulled from their time by the Time Paradox Avoidance Enforcement Squadron and Blendin Blandin.||Blendin's Game|
|July 16-???, 2012||The events of "Soos and the Real Girl" through "
Not What He Seems" occur.
|3012||The end of the world (According to the Mailbox)||Mailbox|
|207̃012|| The year Blendin Blandin is from.|
Blendin is sent to Infinetentiary, then escapes. He invokes Globnar against the Pines twins.
|The Time Traveler's Pig and Blendin's Game|
- The film about Quentin Trembley states he was elected in 1837 as the 8½th President of the United States, but there were elections in 1836, that in it Martin Van Buren was elected eighth President, and in 1840, Trembley's alleged replacement William Henry Harrison (who had lost in 1836) defeated Van Buren's bid for re-election and became the ninth President of the United States.
- According to Alex Hirsch on a Reddit AMA, the whole series takes place over the course of one summer.
|Events in and around Gravity Falls (Timeline)|
|Fishing Season: Opening Day | Glove Story: A Sock Opera | Mystery Fair | Mystery Shack is Back | Northwest Fest | Party at the Mystery Shack | Pioneer Day | Summerween | Woodstick|