2021 (real world)

January

 * January 27: Season 5 of Halo: The Master Chief Collection will be launched.

March

 * March 2: Halo: Point of Light is set to be released.

June

 * June 29: The Art of Halo Infinite is set to launch, following its delay from a 2020 release.

November

 * November 15: Halo: Combat Evolved’s 20th anniversary

December

 * Halo services on Xbox 360 are going to be offline.

Fall

 * Halo Infinite is set to launch, following a delay from its original release year of 2020.

Unknown

 * Halo: The Television Series set to air.