May 21 is the 141st day of the year (142nd in leap years). There are 224 days remaining.
- 1980 – Star Wars: Episode V The Empire Strikes Back released.
- 1980 – Star Wars Weekly 117 published.
- 2002 – Star Wars: Jedi Starfighter: Prima's Official Game Guide published.
- 2002 – Des Webb dies.
- 2003 – Empire 8 published.
- 2003 – Kamikaze Douga founded.
- 2008 – Legacy (2006) 24 published.
- 2008 – Star Wars: Clone Wars Cine-Manga published.
- 2010 – 30th anniversary of Star Wars: Episode V The Empire Strikes Back.
- 2014 – Darth Maul — Son of Dathomir 1 published.
- 2019 – Vader Immortal – Episode I released.
- 2020 – "Battle of Hoth" premieres on YouTube, commemmorating the 40th anniversary of Star Wars: Episode V The Empire Strikes Back.
- 2021 – "Cornered" airs on Disney+.
- 2022 – Colin Cantwell dies.
- 2023 – Ray Stevenson dies.
- 2025 – Legacy of Vader 4 published.
- 2025 – The High Republic – Fear of the Jedi 4 published.
- 2025 – The High Republic Adventures (2023) 18 published.
