This is a timeline of events in Gravity Falls. The series takes place in the summer of 2012.
|c. 65 million BCE||Dipper and Mabel travel back in time and are nearly eaten by a dinosaur.||"The Time Traveler's Pig"|
|1837||Quentin Trembley wins the 9th Presidential Election in the United States of America in a literal landslide.||"Irrational Treasure"|
|June 1842||8½th United States President Quentin Trembley founds Gravity Falls in an uncharted valley of the Pacific Northwest.||"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 on the false promise of allowing them into their annual party.
|"The Time Traveler's Pig" and "Northwest Mansion Mystery"|
|1883||Train car that holds Greasy's Diner is made.||"Society of the Blind Eye"|
|c. 1910||Eustace Huckabone Befufftlefumpter is born.||"Northwest Mansion Mystery"|
|July 21, 1912||The first Northwest Fest takes place, but Nathaniel Northwest breaks his promise made 50 years ago and locks the townfolk out. The lead lumberjack is killed in the ensuing mudslides and curses the Northwest family in his final breath.||"Northwest Mansion Mystery"|
|c. 1953||Identical twin brothers Stanley and Stanford Pines are born in Glass Shard Beach, New Jersey.||"A Tale of Two Stans"|
|Late 1950s – early 1960s||
Filbrick Pines enrolls his sons in boxing lessons to teach them self-defense against bullies.
|1960s||Stan and Ford start re-building an old ship they found in a cave.||"A Tale of Two Stans"|
|Late 1960s – early 1970s||Stan's boxing skills help him save Carla McCorkle from a robbery. Their relationship takes off.||"Dreamscaperers"|
|1970s||Carla leaves Stan for Thistle Downe.||"Boyz Crazy"|
|1972||The Pines family disowns Stanley after his accidental destruction of Stanford's science project costs them potential millions.|
After being rejected from West Coast Tech, Ford enrolls in Backupsmore University.
|"A Tale of Two Stans"|
|1972 – 1982||Stan Pines, now a drifter, tries his hand at solo treasure hunting. It goes about as well as could be expected.|
Dipper and Mabel time travel, ending up in front of the Mystery Shack and almost getting caught by Ford.
Stan travels in and out of the United States in this time as a salesman and moderately successful conman. Among his lineup are the "Shammy", the "Rip-Off", and the "Stan-Vac". He also goes to prison. At least 3 times.
Eventually, while he's hiding in a run-down motel, he receives a postcard from Ford.
|"A Tale of Two Stans" and "The Time Traveler's Pig"|
|c. 1973||Ford is accepted into a doctoral program three years ahead of schedule. He receives a research grant of $100 thousand, for use in the field of his choice.||"A Tale of Two Stans"|
|1975||Ford begins to research Gravity Falls and documents his findings in Journal #1.||"Tourist Trapped" and "A Tale of Two Stans"|
|1981||Fiddleford McGucket ditches his production of a personal computer and works as a research assistant to Ford in the construction of the universe portal.||"Society of the Blind Eye," "A Tale of Two Stans," and "The Last Mabelcorn"|
|June 18, 1981||Ford begins to write Journal #3, six years since beginning of his 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. His mind begins to deteriorate due to repeated use of his memory erasing gun.
Ford is sucked into an alternate dimension.
Stan Pines starts running the Mystery Shack.
"Scary-oke," "Society of the Blind Eye," and "A Tale of Two Stans"
|July 13, 1990||Jesus "Soos" Alzamirano Ramirez 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"|
|1998-1999||Marius von Fundshauser is born.||"Northwest Mansion Mystery"|
|August 31, 1999||Twins Mabel and Dipper Pines are born.||"The Inconveniencing" and "Dipper and Mabel vs. the Future"|
|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.||"Headhunters" and "Blendin's Game"|
|≈2011||Soos predicts Duck-tective to have a secret twin brother.||"Dungeons, Dungeons, and More Dungeons"|
|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 20, 2012||Dipper takes a closeup photo of Stan's partial tattoo.||"Stan's Tattoo"|
|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 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 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 "The Love God" occur.||Episode guide|
|July 21 - ???||The events of "Northwest Mansion Mystery" through "Roadside Attraction" occur.||Episode guide|
August 24, 2012
|The events of "Dipper and Mabel vs. the Future" take place.||Episode guide and "Dipper and Mabel vs. the Future"|
|August 24, 2012||The rift created by the universe portal is broken by a possessed Blendin Blandin. This causes the nightmare realm to merge with the real world, causing the end of the world.||"Dipper and Mabel vs the Future"|
|3012||The predicted end of the world.||"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.
- Blendin Blandin comes from the year 207̃012. However, this contradicts the idea that the end of the world will occur in 3012 (according to the Mailbox). This discrepancy might be explained by the fact that the animated shorts (in which the Mailbox is depicted) may not be canonical, or that the time baby has rebuilt the world since 3012.
|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 | Weirdmageddon | Woodstick|