2021 (real world)

January

 * January 27: Season 5: Anvil of Halo: The Master Chief Collection is launched.

March

 * March 2: Halo: Point of Light is released.

April

 * April 7: Season 6: Raven of Halo: The Master Chief Collection is launched.

June

 * June 13: Halo Infinite will be shown at the Xbox & Bethesda Games Showcase.

August

 * August 11: Halo: Legacy Collection, a compilation of the comic series Halo: Uprising, Halo: Helljumper and Halo: Blood Line, is set to be published by Dark Horse Comics.

September

 * September 28: A new edition of Halo Graphic Novel is set to be published by Dark Horse Comics.

October

 * October 19: Halo: Divine Wind is expected to be released.

November

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

December

 * December 31: The Art of Halo Infinite is set to launch, following its delay from a 2020 release.
 * 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.