Recurrence pattern: every year on November 29.

Chadwick Boseman Day is observed worldwide every November 29 to celebrate the life, legacy, and impact of the American actor known for his portrayals of African-American historical figures and the Marvel superhero T’Challa / Black Panther. The day honors Boseman, who was born on this date in 1976 and passed away from colon cancer in 2020. Fans and organizations, including Howard University, which named its College of Fine Arts after him, commemorate the occasion by re-watching his films, creating artistic tributes, and donating to charities focused on colon cancer research. Since 2020, Boseman's birthday has been celebrated as Chadwick Boseman Day, while Howard University has also observed the anniversary of his death as Chadwick A. Boseman Day since 2022, organizing various events in his honor. The day encourages participants to share their celebrations on social media using the hashtag #ChadwickBosemanDay.