2151 (Columbia)

Reference Stardates 1/0100-1/0112.31

January

Reference Stardate 1/0101.01 (1 January): New Year's celebrations are interrupted by news of a surprise attack carried out by unknown pirates (actually Romulans) at Outer Sector Defense Outpost 4 from the surviving ship, S.S. Carronade, a Cavalry class destroyer. (FASA 2221A: "The Romulan War")
Reference Stardate 1/0101.28: A Romulan U-4 class cruiser destroys the Zoenamy class corvette Runemark near Canis Minoris 12, but is damaged during the long, running battle. (FASA 2221A: "The Romulan War")

April 9: Captain Jonathan Archer awakes in his apartment, having been transported nearly a full year back in time. (ENT 26: "Shockwave")
April 16: The Enterprise NX-01 is launched, beginning its historic mission of exploration, and Captain Archer finds himself in the middle of a Temporal Cold War involving Klingons and Suliban. (ENT 01-02: "Broken Bow")
April 23: Prologue (ENT: "What Price Honor?")
Unknown: (ENT: Strange New Worlds VI, "Cabin E-14" (Sections 8-10))

Unknown: (ENT: Strange New Worlds V, "Hoshi's Gift")
May 6: Ensign Hoshi Sato faces her fears on an alien ship whose crew was murdered, while Lieutenant Malcolm Reed tries to upgrade the ship's defense systems. (ENT 3: "Fight or Flight")
Unknown: (ENT: Strange New Worlds V, "Remnant")
Unknown: A storm traps an away team in a cave on an alien world, and pollen spores cause them to experience psychosis. (ENT 4: "Strange New World")
Unknown: (ENT: "By the Book")

Unknown: Commander Tucker helps an alien crew fix their engines, has an "interspecies encounter" in a holodeck, and returns to find himself pregnant. (ENT 5: "Unexpected")
Unknown: Enterprise is sent to learn what happened to an early Human colony, Terra Nova. (ENT 6: "Terra Nova")
June 16: Captain Archer, Commander Tucker, and Sub-Commander T'Pol are taken hostage by Andorians in a Vulcan monastery on the planet P'Jem. (ENT 7: "The Andorian Incident")

Unknown: (ENT: The Brave and the Bold, Book One, "Discovery")
Unknown: (ENT/TNG: "A Time to Sow", Chapter 1)
Unknown: Lieutenant Reed and Ensign Travis Mayweather extract a rare chemical on a comet while Sub-Commander T'Pol receives encrypted signals from a Vulcan ship. (ENT 8: "Breaking the Ice")
Unknown: (ENT/TNG: "A Time to Sow", Chapter 2)
July 31: Captain Archer and an away team go undercover on a pre-industrial world to investigate an unexpected sensor reading. (ENT 9: "Civilization")

Unknown: The cargo ship E.C.S. Fortunate is damaged by Nausicaan pirates and Enterprise offers a helping hand, only to find the acting-captain has secret plans. (ENT 10: "Fortunate Son")
Reference Stardate 1/0108.01 (1 August): A five-ship task force of cruisers and destroyers patrolling near Gamma Hydra surprises two Romulan U-15 class cruisers. One is destroyed, but the other escapes. (FASA 2221A: "The Romulan War")

September 1: Ensign Sato tries to find out what Lieutenant Reed's favorite food is, while Captain Archer deals with a secretive and aggressive alien first contact. (ENT 12: "Silent Enemy")
September 9: Captain Archer learns that Crewman Daniels is covertly helping to fight the Temporal Cold War against Silik and members of the Suliban Cabal. (ENT 11: "Cold Front")
Unknown: Doctor Phlox and Captain Archer must decide the fate of two species suffering from an evolutionary pandemic. (ENT 13: "Dear Doctor")

Unknown: Sub-Commander T'Pol is recalled to Vulcan. During her final away mission on Coridan, she and Captain Archer are kidnapped, leading to another confrontation between Vulcans and Andorians. (ENT 14: "Shadows of P'Jem")
Unknown: Ensign Sato, Lieutenant Reed and Sub-Commander T'Pol attempt to help an unresponsive Klingon ship escape the crushing pressures of a gas giant. (ENT 15: "Sleeping Dogs")

November 9: After finding debris from Enterprise, Lieutenant Reed and Commander Tucker are stranded in a shuttlepod far from help. (ENT 16: "Shuttlepod One")
Unknown: Enterprise encounters a crew of emotional Vulcans; Sub-Commander T'Pol experiences an illicit mind meld, with unsettling results. (ENT 17: "Fusion")
Unknown: Enterprise finds a sunless solitary planet with a small group of aliens who are hunting "wraiths", an indigenous telepathic and shape-shifting species. (ENT 18: "Rogue Planet")

Unknown: A group of Ferengi hijack Enterprise, but Commander Tucker, Captain Archer and Sub-Commander T'Pol resist the pirates in order to win back their ship. (ENT 19: "Acquisition")
Unknown: Captain Archer and an away team find a crew apparently alive under mysterious circumstances, on a ship that crash-landed years ago. (ENT 20: "Oasis")
December 31: (ENT: "What Price Honor?", Chapters 2, 4, 6, 8)