World Audio Drama Day is observed worldwide every October 30, celebrating the art of audio drama, which includes radio dramas, podcasts, and audiobooks. The day commemorates the anniversary of Orson Welles' famous radio adaptation of "The War of the Worlds," which aired on October 30, 1938, and significantly contributed to the popularity of radio drama in the United States. The holiday was established by Sibby Wieland in 2013, marking its first celebration on the 75th anniversary of Welles' broadcast. Participants celebrate by listening to their favorite audio dramas or discovering new ones, and audiobook publishers often offer special promotions on this day. The event encourages fans to share their experiences on social media using the hashtag #WorldAudioDramaDay.