OS-tanniversary 2004

OS-tanniversary 2004 is an event that ran on August 6, 2004 in the Japanese prefectures of Tokyo, Osaka, Kyoto, and Fukushima. It is the first OS-tanniversary event ever made. This event celebrates the 1st anniversary of ME-tan, whose fisrt art was published on August 6, 2003 in the Japanese imageboard site Futaba Channel.

In this event, they advertised the GameCube title OS-Tan's 1st Anniversary Collection, alongside showing the OS-tan stuff done in 2004 (such as the Troubled Windows flash animation) and giving a shoutout to contributors at SNESmusic for the hard work they done on dumping and preserving SPC files of their games.