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26th century

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For a complete list, see our timeline category.

2537 was a year in the 2530s in the 26th century.



January 1

January 2

  • Serina notes that while the Flood form does not appear to be experiencing suffering, it does seem like it is hungry.

January 3

  • The combat form begins to morph to become more like a carrier form.

January 4

  • The Flood disperse new Pod infectors and overtake more crew members in an attempt to break quarantine. Spartan SCPO Jerome-092 is awoken and exterminates all infected personnel, eliminating the Flood presence on the Spirit of Fire. After the event, Serina starts her final dispensation, killing herself.


March 19


July 27

  • Operation: PROMETHEUS. Most of Spartan-III Alpha Company destroys a Covenant shipyard on asteroid K7-49, but all 300 of the participating Spartans are killed in the process.[2][3]

July 30

  • Kurt discovers the fate of Alpha Company and selects the candidates for Beta Company.[4][5]


December 8



  1. ^ Halo Encyclopedia (2022 edition), page 108
  2. ^ a b Halo: Ghosts of Onyx, pages 83-86
  3. ^ Twitter: Today in Halo - 7/27/2537
  4. ^ Twitter: Today in Halo - 7/30/2537
  5. ^ Halo: Ghosts of Onyx, page 88
  6. ^ Halo Encyclopedia (2022 edition), page 256
  7. ^ a b c Halo: Ghosts of Onyx, page 81
  8. ^ Halo Encyclopedia (2009 edition), page 36 (2011)
  9. ^ Halo: Evolutions, "The Impossible Life and the Possible Death of Preston J. Cole", page 470
  10. ^ Halo Encyclopedia: The Definitive Guide to the Halo Universe, page 272 (2011)