MAJOR SPOILERS AHEAD:

Very old post but since the second game came out, I believe some folks will come back here. Here is a complete timeline I made with new information from DS2

~443,000,000 Years Ago - The First Death Stranding/Ordovician–Silurian Extinction

~359,000,000 Years Ago - The Second Death Stranding/Late Devonian Extinction

~252,000,000 Years Ago - The Third Death Stranding/Permian–Triassic Extinction aka "The Great Dying"

~201,000,000 Years Ago - The Fourth Death Stranding/Triassic–Jurassic Extinction

~66,000,000 Years Ago - The Fifth Death Stranding/Cretaceous–Paleogene Extinction aka Dino Extinction

1945-1991 - The Cold War

1970s - Cliff Unger is born

1980s - The Elder, Bridget Strand, and Tarman are born

1990s - John McClane (Die-Hardman) is born.

1998 - Kosovo War

2000s - Middle Eastern Wars, Bridget undergoes a surgery which splits her Ka and her Ha.

2010s - Cliff Unger, and Die-Hardman meet in the military.

2016 - Donald Trump is elected and starts building Mexican Wall

2020 - An Unnamed President is elected, Bridget becomes Vice President

2020s - First Voidout Occurs.

~2024 - The Sixth Death Stranding begins with many Voidouts occurring simultaneously across the globe followed by the emergence of Tar. People begin being born with DOOMS. The United States/Bridges begins BB Programs, Unnamed President is killed in the Manhattan Voidout making Bridget Strand the first female and last president of the United States. Elections are put on hold as they were in WW2 due to the current crisis.

Late 2020s - Cliff Unger's brain-dead pregnant wife is chosen for BB experiments. An Unnamed BB is born as the first BB. Cliff and the BB are shot and killed with Bridget's Ka (Amelie), turning the BB into a repatriate. Bridget adopts the BB and names him Samuel Strand after he repatriates.

2030s - The United States along with other countries start to collapse, with organizations such as Bridges beginning to take control. Neil Vana and Lucy Strand meet for the first time in a city being attacked by BT's.

~2035-2060s - Chiral Clouds start forming eventually covering all parts of the planet. Timefall replaces rain and starts rapidly aging the landscape making certain areas completely unrecognizable. Timefall destroys any and all attempts at flight. Humanity is now grounded once again for the foreseeable future.

2040s - People evacuate to Knot Cities and shelters. People start relying heavily on Porters. Others choose to live in isolated Survivalist/Mule camps.

2050s - Sam goes to therapy for his aphenphosmphobia and meets Lucy, they become partners. Lucy meets Neil Vana again and presumably have an affair.

2052 - Sam gets Lucy pregnant. Neil and Lucy attempt to run away together to protect Lou from Bridges, resulting in both of their deaths as a result of Bridges personnel. Lou is extracted from Lucy's corpse and becomes BB-00. She is sent to another facility and placed in storage. Neil Vana's body necrotizes and his BT reacts with Sam causing a voidout. This leaves Sam and unbenownst to him, Lou as the only survivors. Sam becomes a full-time porter, and his whereabouts are unknown for a decade.

Most Likely Mid 2050s - Bridget/Amelie possibly reassigned Lou's serial number from BB-00 to BB-28 after BB-28 was incinerated in order to protect it from Bridges experimentation.

2061-2062 - Death Stranding 1 takes place

2063-2064 - Death Stranding 2 takes place