Italics denotes headcanon or just stuff that makes more sense.
1809: Publication of Philosophie Zoologique.
1811: Joel Goldsmith is born
1832: Joel Goldschmidt establishes the "Zoo" near Bordeaux, France and presumably begins "Joel's Diary". The mummy of an unknown life-form is brought to the zoo and dubbed "SAYA". Extracted from its pregnant belly are two cocoons, which react to drops of human blood. Extracted from the cocoons are two children that are human in appearance. As an experiment, the two are given different growth environments in order to observe their growth difference. Joel chooses to raise one, which he names Saya, like his own daughter. The other is left unnamed and is locked up in a tower, where Joel's assistant Amshel takes care of her only giving her the minimum necessary to live.
1859: Publication of Darwin's Origin of Species
1863: Saya ceases aging. Joel becomes aware of the special properties of her blood. Saya becomes aware of the existence of someone locked up in the tower and names her Diva.
1870's: To research the reproduction ability of Saya, 12 years old Haji is received. 12-year-old Haji is introduced to Saya to investigate her reproductive potential. Experimentation on Diva presumably continues, with Amshel, a member of a branch family, acting as an aid to Joel.
1883: 1883 The "blank page" in Joel's Diary. Saya releases Diva from the tower to sing at Joel's 72nd birthday. Haji falls from a cliff, and Saya turns him into a Chevalier via a mouth-to-mouth transfusion of her blood. Diva murders all humans who were in the castle excluding Amshel, her Chevalier. This tragedy was later recorded as "Bordeaux Sunday". Humans infused with Diva's blood appear and begin attacking humans. These creatures are named "Chiroptera". "Red Shield" is established by Joel's grandchildren and begins to pursue Diva. Amshel becomes Diva's Chevalier.
Between 1883 and 1888: Saya goes into hibernation
1885: Diva goes into hibernation
***NOTE ABOUT THE RUSSIAN PERIOD***
This makes absolutely no sense! Solomon is made a Chevalier at the end of World War I (1918) when Diva is waking up, but Diva was wide awake in 1916, according to Blood+ Adagio. I'm going to sort of gloss over that and have her be awake and active in both, but this canon is dumb.
1914: World War I begins
1915: Diva wakes up
Grigori becomes Diva's Chevalier
1916: Saya wakes up.
Rasputin is ‘killed’ by the Russian people. He took refuge in a village near his hometown and took the form of a young girl; ‘Sonya’.
1917: Beginning of Russian Revolution
1918: Rasputin is killed by Saya.
Saya goes to sleep.
World War I ends.
(Canon, but funky: Diva "awakens")
Solomon becomes Diva's Chevalier
(What I go by: Diva goes to sleep)
***ABOUT KARL***
Canon says that Karl became her Chevalier somewhere around the same time as Solomon, but because of the date complications and the fact that it makes zero sense for Karl to become her Chevalier at this time, I ignore those dates. See Vietnam for Karl's dates.
1939: World War II begins
***ABOUT WWII***
Again, these dates don't match up. We know that Diva's Chevalier worked with the Nazi party and that she was awake during this time. Waking up thirty years later would but both Saya and Diva a few years after the War was over. We can assume that the thirty years thing is approximate, but...well, it's just bad writing. As such, I have my own dates that make more sense.
1940: Saya awakens
1942: Diva awakens
Martin Bormann becomes Diva's Chevalier
1945: James becomes Diva's Chevalier
Martin is killed by Solomon on Amshel's orders
World War II ends
Diva goes to sleep
1959: Vietnam War begins
***NOTE: Canon timeline lists this as 1965, which is when the US troops were deployed, but the war began earlier than that***
1968: Saya awakens
1971: Diva awakens
Karl becomes Diva's Chevalier (See above note)
Saya goes to sleep
1972: Chiroptera sightings in Vietnam confirmed. Red Shield injects Haji's blood into a hibernating Saya to cause an artificially induced awakening, resulting in her going berserk, killing Chiroptera and humans alike. Saya cuts off Karl and Haji's right arms. Saya re-enters hibernation and the dying original David entrusts her to George Miyagusuku. Haji, displeased by the incident, distances himself from Red Shield. Red Shield sights him in Hong Kong, but is unable to keep track of his whereabouts. George takes Saya to Okinawa. Karl's arm is cut off.
1974: Diva goes to sleep
1975: Vietnam War ends
2002: The 6th Joel is inaugurated as the head of Red Shield.
2004: Saya awakens in Okinawa without her previous memories. She lives with the Miyagusuku Family, under the surveillance of the 2nd David, with the agreement that once Saya remembers her past, she will go with Red Shield.
2005: Saya reunites with Haji and is caught up with the fight against Chiroptera. George Miyagusuku becomes a Chiropteran and Saya is forced to kill him. Leaving Kai and Riku behind, Haji and Saya once again ally themselves with Red Shield.
Diva awakens.
Riku becomes Saya's Chevalier.
Riku dies.
2006: Diva gives birth
Saya kills James, Solomon, Karl, and Diva.
Haji kills Amshel.
Cocoons hatch.
Saya goes to sleep.
***ABOUT NATHAN***
Because Blood+ never told us shit about Nathan, I have no idea where he fits on this timeline or what he is. No one does. Protip: Being mysterious about a person is a lot more effective when you give indication before instead of in the very last episode.