Template:OTD/September 21


 * 1999: Episode of Digimon Adventure premieres in North America.
 * 1999: Chapter of Digimon Adventure V-Tamer 01  is published in Japan.
 * 2000: Chapter 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 of Digimon Adventure V-Tamer 01  is published in Japan.
 * 2002: Chapter of Digimon Adventure V-Tamer 01  is published in Japan.
 * 2006: Chapter of Digimon Next is published in Japan.
 * 2007: Digital Monster Card Game α X-Antibody × Hybrid is released in Japan.
 * 2010: Chapter of Digimon Xros Wars is published in Japan.
 * 2011: Chapter of Digimon Xros Wars is published in Japan.
 * 2013: Chapter of Digimon World Re:Digitize Encode is published in Japan.