2530

January

 * January 7: Serina is created by Daedalia Technology and assigned as the 's AI.
 * January 30: Kat-B320 is born in Monastir, New Harmony.

February

 * February 7: Indrid Lota is born in the human world of Aleria.

July

 * July 9: Holly Tanaka is born on the human Outer Colony of Minab.

August

 * August 17: Sergeant John Forge is incarcerated for assaulting Lieutenant Prosser.

October

 * October 19: Anthony Madsen is born on New Llanelli.
 * October 20: Michael "Mickey" Crespo is born in Crisium City, Naniwa, on Luna.

November

 * November: James Cutter, captain of UNSC Spirit of Fire, decided to give his executive officer, Terrence Hood, command of the.

December

 * December 24: The Battle of Groombridge-1830 takes place, resulting in a costly UNSC victory.
 * December 25: Subject 386 is interrogated by Fleet Admiral Preston Cole and First Lieutenant Richard Lionel Barclay. The interrogation is recorded by the AI Solipsil.

Unknown

 * The human colony of Eridanus II is glassed by the Covenant.
 * Rani Sobeck is born.
 * Jake Courage's photo exhibit Killing Time wins the John Pilger Prize.
 * The Assembly discusses the losses in the Human-Covenant War so far, as well as the possibility of re-terraforming glassed human worlds. To prevent human extinction, they also decide that they must be more open with their actions.
 * Thrust assemblies are replaced on the from the scuttled UNSC destroyer Calcutta.
 * SPARTAN-II Blue Team shuts down the United Rebel Front's Station Jefferson in the Eridanus system.
 * Blue Team destroys, captures or otherwise eliminates the URF destroyer Origami sometime prior to November.
 * Blue Team eliminates a URF high-explosive manufacturing facility at an unspecified location sometime around November.
 * Blue Team disrupts URF activity in Micronesia and breaks up a saboteur ring on Reach between November of this year and May 2531.