In case it helps, here's the timeline I had written for my campaign:
4624: Foxglove manor is built
4644: Vorel Foxglove’s ritual to become a lich is interrupted by his wife Kasanda. Vorel, Kasanda, their young daughter, and all the manor’s servants die in the chain reaction.
4665: Sandpoint is built.
4673: Lonjiku Kaijitsu’s father inherits the Glassworks and seals off the smuggler tunnels.
4687: Jervas Stoot moves to the island north of town. Traver Foxglove and his family move into Foxglove manor. Later that same year, his wife Cyralie gave birth to their son Aldern (they already had two daughters).
4693: Traver Foxglove kills his wife and then commits suicide.
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THE LATE UNPLEASANTNESS
Pharast 4701: Delek Viskanta and Nualia Tobyn begin having a relationship.
Desnus 6th, 4701: Tsuto and Ameiko have a big argument. Tsuto strikes Ameiko. Ameiko leaves Sandpoint to become an adventurer.
Erastus 20th, 4701: Nualia realizes that she’s pregnant and announces it to Delek. He leaves her, and Sandpoint.
Kuthona 28th, 4701: Karzoug activates his runewell. ("The runewell in the Catacombs of Wrath under Sandpoint sends a shockwave of magical energy through the town above, manifesting in the form of violent nightmares from which many folk woke in a terrible rage that vanished in the span of a heartbeat"). Lonjiku Kaijitsu kills his wife by throwing her down a cliff. Nualia has her miscarriage. Chopper begins murdering people.
Abadius 10th, 4702: Kerista’s mother is murdered by Chopper (his 9th victim).
Abadius 26th, 4702: Chopper’s last murder, and Mr. Stoot is found dead.
Calistril 2nd, 4702: The funeral of Atsuii Kaijitsu. Ameiko comes back to Sandpoint for this event, and seems to abandon her life as an adventurer from then on. Tsuto accuses his father of killing his mother. Lonjiku strikes him with his cane, almost breaking his jaw. Tsuto curses him and leaves Sandpoint.
Calistril 21st, 4702: The church of Sandpoint is burnt to the ground. Father Tobyn’s remains are found in the ruins. Nualia's corpse is never found, and is assumed to have perished in the blaze.
Spring 4702: Nualia goes to Magnimar, meets the Skinsaw Men, and murders Delek.
Summer 4702: The leader of the Skinsaw Men gives a Sihedron medallion to Nualia and tells her to explore the catacombs below Sandpoint. Nualia finds the Catacombs of Wrath and begins learning under Erylium for many months (until spring of the following year).
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Summer 4706: Aldern returns to Magnimar and starts living there, interacting with wealthy people, and contacting the Brotherhood of Seven. He begins to reconstruct the manor.
Fall 4706: Tsuto join Nualia’s group in Magnimar.
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Calistril 4707: Aldern meets Iesha and marries her.
Desnus 4707: Nualia and her followers arrive at Thistletop and take control of the goblin tribe there.
Erastus 30th, 4707: Aldern murders Iesha and hides her body.
Rova 18th, 4707: Aldern accepts to gather some diseased rat sample from his manor. First, though, he goes to Sandpoint to steel his nerves. Tsuto blackmails his father to help the raid.
Rova 21st 4707: The Swallowtail Festival. The Burnt Offerings adventure starts.