From Halopedia, the Halo wiki
2520 was a year in the 2520s in the 26th century.
- Captain Alexander, the last civilian captain of UNSC Spirit of Fire, retires from active duty at the conclusion of the Verent mission. The ship is requisitioned by the UNSC and scheduled for refit.
- Spirit of Fire completes an extensive refit at the Reach orbital shipyards before entering active military duty as a ground support vessel, initially detailed with providing ground support for Operation: TREBUCHET.
- The SPARTAN-II program suffers its first casualty, when Carris-137 accidentally kills a handler during training.
- A major uprising occurs in the population centers on Talitsa.
- The Daily Bulletin, a Human newspaper company, began printing this year.
- Manufactured by Martian Metals Shipyards, the Mulzac-class transport enters service.
- Manufactured by SinoViet Heavy Machinery, the Charon-class light frigate enters service.
These are events that are based around this year, and may not fall on this year specifically.
Between January 28, 2519 and January 27, 2520
- Halo Encyclopedia (2022 edition), page 111
- Halo Encyclopedia (2022 edition), page 97
- Halo Wars, Timeline Events: 20 July 2520
- Halo Wars, campaign level Cleansing
- Halo Waypoint - Universe, Characters, Carter-A259 (Retrieved on Nov 12, 2020) [local archive] [external archive]
- Halo.Bungie.Net - Project, Halo: Reach, Intel, Personnel, Carter (Retrieved on Oct 20, 2020) [archive]
- Halo: The Essential Visual Guide, page 29 (Carter)
- Halo Encyclopedia (2022 edition), page 98
- Halo Wars, Timeline Events: 1 September 2520
- Halo: Reach: Limited Edition, Dr. Halsey's personal journal: September 27, 2510
- Halo Waypoint - Universe - Locations, Talitsa (Retrieved on Mar 8, 2021) [local archive] [external archive]
- Halo 2: Anniversary, campaign level Outskirts
- Halo Waypoint - News, Canon Fodder, Shippin' Out (Issue 124) (Retrieved on Feb 2, 2022) [archive]
- Halo Encyclopedia (2022 edition), page 122
- Halo: Glasslands, chapter 3
- Halo: Mortal Dictata, chapter 3
- Halo: Glasslands, chapter 7