The 21st of December marks the 355th day of the year (or the 356th if it's a leap year). Only 10 days remain until the year concludes.
- 1948 – The birth of Samuel L. Jackson occurred.
- 1975 – Chip Zdarsky came into the world.
- 1977 – The birthdate of Jacopo Camagni.
- 1982 – The day that Luis Antonio Delgado was born.
- 1983 – Issue number 27 of Return of the Jedi Weekly was released to the public.
- 1985 – Issue number 131 of Return of the Jedi Weekly saw publication.
- 1987 – The winter publication of The Lucasfilm Fan Club Magazine 2 took place.
- 1988 – The winter saw the publishing of The Lucasfilm Fan Club Magazine 6.
- 1990 – Mandeep Dhillon's birthday.
- 2001 – Subscribers received their copy of Star Wars Gamer 8.
- 2003 – The passing of Ron Frazier occurred.
- 2005 – Republic 80 was made available.
- 2005 – The release of Empire 38 to the public.
- 2011 – Publication of Knight Errant: Deluge 5 occurred.
- 2016 – The release of Doctor Aphra (2016) 2 hit shelves.
- 2016 – Star Wars Rebels Magazine 26 saw its release.
- 2019 – The death of Gerry Alanguilan occurred.
- 2020 – Chapters eight and nine of The Vow of Silver Dawn were released.
- 2021 – Star Wars: Darth Vader Vol. 3 — War of the Bounty Hunters was published.
- 2021 – Star Wars Adventures: The Light and the Dark was released.
- 2021 – The publishing of Star Wars: Be More Boba Fett took place.
- 2021 – Star Wars: Darth Vader by Charles Soule Omnibus was made available to the public.
- 2021 – "Star Wars Inside Intel: Holidays of the Galaxy" appeared on StarWars.com.
- Find December 21 on Wikipedia