Template:OTD/September 21


 * 1999: Episode 7 of Digimon Adventure premieres in North America.
 * 1999: Chapter 11 of Digimon Adventure V-Tamer 01 is published in Japan.
 * 2000: Chapter 23 of Digimon Adventure V-Tamer 01 is published in Japan.
 * 2000: The album Digimon Adventure 02: Single Hit Parade is released in Japan.
 * 2001: Chapter 35 of Digimon Adventure V-Tamer 01 is published in Japan.
 * 2002: Chapter 47 of Digimon Adventure V-Tamer 01 is published in Japan.
 * 2006: Chapter 10 of Digimon Next is published in Japan.
 * 2007: Digital Monster Card Game α X-Antibody × Hybrid is released in Japan.
 * 2010: Chapter 4 of Digimon Xros Wars is published in Japan.
 * 2011: Chapter 15 of Digimon Xros Wars is published in Japan.
 * 2013: Chapter 06 of Digimon World Re:Digitize Encode is published in Japan.