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", "Northwest Mansion Mystery"|
|1883||Train car that holds Greasy's Diner is made.||"Society of the Blind Eye"|
|c. 1909||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"|
|Late 1940s - early 1950s||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.
|Early 1960s||Stan and Ford start rebuilding 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"|
|Early 1970s||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 seen 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.
|"A Tale of Two Stans", "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", "A Tale of Two Stans"|
|1981||Ford finds the cave drawings that depict Bill Cipher and summons him, hoping he will give him the answers to the mysteries of Gravity Falls. Ford and Bill become partners and start work together. Bill suggests Ford build a universe portal.
Fiddleford McGucket ditches his production of a personal computer and works as a research assistant to Ford in the construction of the portal.
|"The Last Mabelcorn", "Society of the Blind Eye", "A Tale of Two Stans"|
|June 18, 1981||Ford begins to write Journal 3, six years since beginning of his research on Gravity Falls.||"Tourist Trapped"|
|1982||Ford and McGucket test the portal. Due to an accident, Fiddleford gets sucked into it and reveals there is a nightmare realm on the other side, but Ford rescues him.
Ford sends Stan a postcard requesting his help.
The Government takes notice of some odd readings in Gravity Falls, Oregon.
"A Tale of Two Stans", "Society of the Blind Eye", "Scary-oke",
|July 13, 1990||Jesus "Soos" Alzamirano Ramirez is born.||"Blendin's Game"|
|1990–95||Jeffy Fresh, Byrone, and Rosie are living in Gravity Falls.|
|May 2, 1995||Ma and Pa Duskerton die, assuming 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"|
|1998–99||Marius von Fundshauser is born.||"Northwest Mansion Mystery"|
|August 31, 1999||Twins Mabel and Dipper Pines are born.||"The Inconveniencing," "Dipper and Mabel vs. the Future"|
|June – July 2002||Gideon Gleeful is born.||"Blendin's Game"|
|July 13, 2002||Soos turns twelve, and 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," "Blendin's Game"|
|October 10th, 2006||Dipper and Mabel are in 2nd grade. There is photo day at their school.||"Weirdmageddon 2: Escape From Reality"|
|February 14th, 2009||Dipper and Mabel are in fourth grade. Dipper doesn't get any Valentines and gets teased. However, Mabel gives him some of her Valentines.||"Weirdmageddon 2: Escape From Reality"|
|≈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," "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 4–21, 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—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 16–20, 2012||The events of "Soos and the Real Girl" through "The Love God" occur.||Episode guide|
|July 21, 2012||The events of "Northwest Mansion Mystery" take place.||"Northwest Mansion Mystery"|
|July 21—August 23, 2012||The events of "Not What He Seems" through "Roadside Attraction" occur.||Episode guide|
|August 24, 2012||The events of "Dipper and Mabel vs. the Future" take place.||"Dipper and Mabel vs. the Future"|
|August 24 – 29, 2012||Weirdmageddon descends on Gravity Falls.||"Weirdmageddon Part 1"|
"Weirdmageddon 2: Escape From Reality"
"Weirdmageddon 3: Take Back The Falls"
|August 29, 2012||Bill Cipher is erased from the mental realm, terminating Weirdmageddon.||"Weirdmageddon 3: Take Back The Falls"|
|August 31, 2012||One day after the events of Weirdmageddon, Dipper and Mabel celebrate their 13th birthday with all of the townsfolk in the Mystery Shack, Stan Pines retires and gives ownership of the Mystery Shack to Soos.||"Weirdmageddon 3: Take Back The Falls"|
|September 1, 2012||Dipper and Mabel leave Gravity Falls to Piedmont, California.||"Weirdmageddon 3: Take Back The Falls"|
|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," "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 reelection and became the ninth President of the United States.
- 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.
- However, in the cipher from "Weirdmageddon Part 1," it says that Time Baby's particles will take 1000 years to reform, and because the show takes place in 2012 it would mean that in 1000 years his molecules will come back together, and that matches the date that the Mailbox gave.
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