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Hazel Levesque is born in New Orleans, Louisiana.
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Bianca di Angelo, born in Venice, Italy, is approximately two years older than her younger brother Nico.
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Nico di Angelo is born in Venice, Italy.
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Approximately around the time of the Tripartite Pact between the Axis powers, when Japan officially joins World War II.
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Approximately around the time of Japan's attack on Pearl Harbor.
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He gives Hazel a set of colored pencils and a sketch pad for her birthday, and apologizes for her curse. The next day, Marie and Hazel move to Alaska.
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Marie dies when she attempts to resurrect the titan Alcyoneus under Gaea's control.
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Sally was born in the early to mid-1970s.
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Sally's parents Jim and Laura died in a plane crash 150 miles south of Lake Ontario at 3 A.M. She was raised by her uncle Rich Jackson.
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Grover has an uncle named Ferdinand.
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Michael Varus leads the Fifth Cohort to Alaska and never returns.
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Rich Jackson dies of cancer while she’s in her senior year of high school.
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Luke is born in in Westport, Connecticut, to May Castellan.
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May Castellan tries and fails to become the new Oracle, leading to her eventual descent into madness.
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Thalia was born to Beryl Grace, a TV starlet who became unstable and an alcoholic when her lover Zeus left her. She is around 7 years older than her younger brother Jason at the time of his birth.
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Poseidon meets Sally Jackson and establish a relationship through which Percy is conceived.
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Annabeth is born from the thoughts of Athena as a gift for Frederick Chase.
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Percy was born in New York City to Sally Jackson.
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Frank was born in Vancouver, Canada to Emily Zhang.
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Jason was born to Beryl Grace, a TV starlet who became unstable and an alcoholic after her lover Zeus left her. He's 7 years younger than his sister Thalia at the time of his birth.
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Piper was born to Tristan McLean. Leo was born in Houston, Texas to Esperanza Valdez.
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After being handed to Hera by his mother, Jason trains with Lupa and arrives at Camp Jupiter. Thinking her little brother died, Thalia grows angry and runs away from home, meeting Luke shortly after.
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Sally marries Gabe Ugliano so that his scent can hide her son Percy from the monsters that normally attack demigods.
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Annabeth runs away from home, encounters Luke, Grover and Thalia. As they arrive at Camp Half-Blood, they are attacked by a cyclops and Thalia is turned into a tree.
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Esperanza died in a fire in her mechanic shop started by her son Leo. After her death, Leo was put in foster care.
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Mrs. Dodds teaches pre-algebra at Yancy Academy. Percy starts studying there.
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Luke steals Zeus' master bolt, becoming the book's titular Lightning Thief.
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Mrs. Dodds attacks Percy at the museum.
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Percy is kicked out of Yancy Academy, then after a trip to Montauk with his mother he is attacked by the Minotaur and brought to Camp Half-Blood for the first time. Sally Jackson is kidnapped by Hades.
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Frank Zhang turns 12 years old. He's still living in Canada with his family.
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Percy, Annabeth and Grover set off on a quest to recover Zeus' master bolt, clear Percy's name and stop a war between the gods.
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Percy returns the master bolt to Zeus on Olympus and meets his father for the first time.
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Percy Jackson duels Ares for the Master Bolt and for the Helm of Darkness, and wins.
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Jason Grace turns 12 years old. He's still at Camp Jupiter.
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Annabeth Chase turns 13 years old.
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Luke is revealed to be a traitor and disappears from Camp Half-Blood.
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Percy Jackson turns 13 years old.
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Percy meets Tyson at Meriweather Prep. He doesn't yet know Tyson's his brother.
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Bianca and Nico di Angelo are pulled out of the Lotus Casino and Hotel, and enrolled in school by Alecto the Fury.
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Hylla and Reyna escape from Circe’s island and go their separate ways. Hylla joins the Amazons and Reyna ends up at Camp Jupiter.
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Grover is kidnapped. Luke poisons Thalia’s pine tree. Annabeth, Percy, Tyson and Clarisse go on a quest to the Sea of Monsters to find the Golden Fleece and rescue Grover. Percy and Annabeth encounter Hylla on Circe’s island. Thalia is resurrected.
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Frank Zhang turns 13 years old. He's still living in Canada with his family.
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Jason Grace turns 13 years old. He's still at Camp Jupiter.
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Annabeth Chase turns 14 years old.
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Percy Jackson turns 14 years old.
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In late 2007/early 2008, Clarisse explores the Labyrinth.
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In early December, Percy meets Nico, Bianca, and the Hunters for the first time. Annabeth is kidnapped. Sally starts dating Paul.
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Bianca di Angelo dies while trying to acquire a Mythomagic figurine for her little brother.
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Percy meets Rachel Elizabeth Dare for the first time. Zoe Nightshade dies. Thalia joins the Hunters one day short of turning 16.
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In early 2008, Silena is recruited as a spy.
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Nico di Angelo turns 12 years old. He escaped into the labyrinth after his sister's death.
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In early spring 2008, Luke visits Annabeth and asks her to run away with him.
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In early June, Percy meets Rachel Elizabeth Dare again. Annabeth starts the quest in the labyrinth. In mid-June, Percy is stranded on Calypso’s island for two weeks. In late June, Luke’s body is taken over by Kronos. The Battle of the Labyrinth occurs, in which Lee Fletcher and Castor die.
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Frank Zhang turns 14 years old. He's still living in Canada with his family.
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Jason Grace turns 14 years old. He's still at Camp Jupiter.
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Festus is discovered and turned on. Percy and Annabeth attend the fireworks together.
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Annabeth Chase turns 15 years old.
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Percy Jackson turns 15 years old.
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In late 2008/early 2009, Nico discovers and visits Camp Jupiter for the first time. Sally marries Paul Blofis.
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In late December, Nico, Thalia and Percy go to the Underworld on a quest for the sword of Hades.
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Nico di Angelo turns 13 years old. He's escaped to the Underworld and travels between camps as ambassador to Pluto after the Battle of the Labyrinth.
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Frank Zhang turns 15 years old. He's still living in Canada with his family.
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Jason and Reyna are elected praetors of Camp Jupiter.
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Jason Grace turns 15 years old. He's a Praetor at Camp Jupiter.
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Annabeth Chase turns 16 years old.
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Charles Beckendorf dies, sacrificing himself to give Percy enough time to avoid the explosion of the Princess Andromeda. Rachel Elizabeth Dare kisses Percy.
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Battle of Manhattan takes place. Silena Beauregard, Michael Yew and others die in battle. The Roman Legion storms Mount Othrys, with Jason Grace defeating the titan Krios.
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Luke Castellan kills himself in order to stop Kronos from using him to destroy Olympus. Percy turns 16, fulfilling the Great Prophecy. Rachel Elizabeth Dare becomes the Oracle. Percy and Annabeth start dating.
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Thanatos is captured by Gaia’s forces. This means monsters and titans don't die. Zeus cuts off communication to the demigods and Hera is captured.
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Nico finds Hazel in the Underworld and brings her to Camp Jupiter.
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On Percy and Annabeth's 1-month anniversary (which Percy forgets), Hermes asks them to recover his stolen caduceus from Cacus. When the quest is complete, Hermes sends them to Paris for their anniversary date.
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Jason goes missing from Camp Jupiter.
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Percy goes missing from Camp Half-Blood.
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Hazel Levesque has a birthday, but it seems like she doesn't count that birthday because she turned 13 back in New Orleans, in 1941; therefore she still considers herself to be 13. She's at Camp Jupiter.
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Jason appears on the Wilderness School Bus with no memory.
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Jason, Leo and Piper leave on their quest to rescue Hera.
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Jason and Thalia meet again after over 12 years of separation.
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Jason, Leo and Piper free Hera, and return to Camp Half-Blood.
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Nico di Angelo turns 14 years old. He's still traveling between camps.
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Emily Zhang dies. Frank goes to Lupa and later arrives at Camp Jupiter. Percy wakes up and trains with Lupa, starts making his way to Camp Jupiter but has to deal with gorgons. Coach Hedge marries Mellie the aura.
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Frank Zhang turns 16 years old. He's a probatio at Camp Jupiter.
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Percy arrives at Camp Jupiter after fighting against the gorgons.
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Frank, Hazel and Percy go on quest to get the Roman standard back. Percy’s memory returns.
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Percy is elected as a praetor of Camp Jupiter.
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Jason, Piper, Leo and Annabeth arrive at Camp Jupiter on the Argo II. Percy and Annabeth reunite. The quest to find the Athena Parthenos begins.
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The crew of the Argo II travel to the Mediterranean Sea to find the Athena Parthenos and rescue Nico from the giants.
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Jason Grace turns 16 years old. He's on the Argo II. The seven (plus Nico) recover the Athena Parthenos. Percy and Annabeth fall into Tartarus.
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Nico leads Hazel, Frank, Jason, Piper and Leo to the Doors of Death in Epyrus. Percy and Annabeth head towards the doors through Tartarus.
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Annabeth Chase turns 17 years old. She's at Camp Half-Blood.
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Jason Grace steps down as Praetor of the Roman Legion, promoting Frank Zhang instead. Percy Jackson and Annabeth Chase escape from Tartarus with the help of Damasen and Iapetus (Bob), and the Doors of Death are closed. Nico, Reyna and Coach Hedge set off with the Athena Parthenos to return it to the Greeks and stop the war between the camps.
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Nico, Reyna and Coach Hedge shadow-travel the Athena Parthenos back to Camp Half-Blood. Percy, Annabeth, Hazel, Frank, Jason, Piper and Leo travel to Athens on the Argo II in order to destroy the Giants but can't stop Gaea from rising. Back at Camp Half-Blood, Leo manages to stop her by sacrificing himself. Peace between the camps is restored.
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The Seven join forces with the gods to destroy the Giants in Athens. At Camp Half-Blood, the Romans prepare to attack the Greeks. Gaea rises and appears at Half-Blood Hill, where she's taken down by Leo's sacrifice. The prophecy of the Seven is fulfilled.
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Percy Jackson turns 17 years old. He's at Camp Half-Blood.
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Apollo appears in New York in the form of a human teenager named Lester Papadopoulos, and makes his way to Camp Half-Blood with Meg McCaffrey in tow.
