2022

January

 * January 13: Halo services on Xbox 360 are shut down.

February

 * February 15: Halo: The Television Series is renewed for a Season 2.

March

 * March 13: Halo: The Rubicon Protocol was originally set to be released, before being delayed until April 12th.
 * March 24: "Contact", the first episode of Halo: The Television Series aired on Paramount+, marking the start of the series' first season and the start of the show overall.
 * March 29: The Halo Encyclopedia (2022 edition) was set to release, before being delayed until April 12th.
 * March 31: "Unbound", the second episode of the first season of the Halo television series, aired.

April

 * April 7: "Emergence", the third episode of the first season of the Halo television series, aired.
 * April 12:
 * Halo: The Rubicon Protocol was set to release on this date, before being pushed back yet again to June 28.
 * The Halo Encyclopedia (2022 edition) is released.
 * April 14: "Homecoming", the fourth episode of the first season of the Halo television series, aired.
 * April 21: "Reckoning", the fifth episode of the first season of the Halo television series, aired.
 * April 28: "Solace", the sixth episode of the first season of the Halo television series, aired.

May

 * May 03: The second season of Halo Infinite's multiplayer; Season 02: Lone Wolves, is launched.
 * May 05: "Inheritance", the seventh episode of the first season of the Halo television series, is aired.
 * May 12: "Allegiance", the eighth episode of the first season of the Halo television series, is aired.
 * May 19: "Transcendence", the ninth and final episode of the first season of the Halo television series, is aired.

June

 * June 28: Halo: The Rubicon Protocol was set to release on this date, before being pushed back for a third time to August 9.

August

 * August 9: Halo: The Rubicon Protocol is released.
 * August 16: The Official Halo Cookbook is released.

October

 * October 18: Halo: Outcasts was set to release, before being delayed to May 30, 2023.

November

 * November 07: Vertical Umbrage is released on Halo Waypoint.
 * November 08: The Winter Update of Halo Infinite's multiplayer is launched.

December

 * December 6: Halo: Initiation and Escalation is released.