From Halopedia, the Halo wiki
- February 15: Dr. Catherine Halsey delineates the fundamentals of the SPARTAN-II program, specifically her refinements in relation to the ORION Project.
- February 23: Dr. Halsey learns of a terrorist with the Freedom and Liberation Party that detonated a commercial nuclear explosive in the Haven arcology, and proceeds to log this in her journal.
- March 5: Jorge-052 is born in Pálháza on Reach.
- March 7: John-117 is born in Elysium City on Eridanus II.
- March 19: Linda-058 is born on Verent.
- May 4: Petra Janecek is born in Serif on Lenapi.
- May 8: Jerome-092 is born on Minister.
- May 16: Caleb-095 is born in Newport on Luyten.
- July 10: Samuel-034 is born on Harvest.
- July 17: Alice-130 is born on Passage.
- July 30: Dr. Catherine Halsey outlines the basis of the piezoelectric mechanical enhancement of what would become the MJOLNIR Powered Assault Armor.
- September 8: Dr. Halsey writes down her thoughts regarding the recent breakthroughs on human neural cloning in relation to the flash cloning of the SPARTAN-II candidates. She informs Vice Admiral Michael Stanforth that the project will proceed to the candidate procurement stage.
- September 15: Naomi-010 is born on Sansar.
- October 19: Kurt-051 is born in Mira on Circumstance.
- October 22: A report is made on Forerunner artifacts that are found during routine excavations in an area designated Zone 67.
- Most of the future SPARTAN-IIs are born in this year.
- Halo: Ghosts of Onyx, page 124
- Dr. Halsey's personal journal
- Game Informer February 2010 Issue
- DK Publising - Halo 4: The Essential Visual Guide Preview
- Halo Waypoint - Linda-058
- Halo Waypoint - Frederic-104
- Halo Waypoint - Douglas-042
- Halo Waypoint: Petra Janecek
- Halo Waypoint - Jerome-092
- Halo Waypoint: Samuel-034
- Halo Waypoint - Universe: Alice-130
- Halo Waypoint - Exclusive Halo: Mortal Dictata Prologue and Chapter One Excerpt
- Halo: Ghosts of Onyx, page 125
- Halo: The Fall of Reach
- Halo Waypoint: Randall Aiken