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List of 2004 California Conventions
| Convention | Dates | Location |
|---|---|---|
| Gallifrey One 2004 | February 13-16, 2004 | Airtel Plaza Hotel Van Nuys, CA |
| Anime Overdose 2004 | March 5-6, 2004 | Santa Clara University Santa Clara, CA |
| Wizard World Los Angeles 2004 | March 19-21, 2004 | Long Beach Convention Center Long Beach, CA |
| RECCA Con 2004 | March 20, 2004 | Los Medaos College Pittsburg, CA |
| WonderCon 2004 | April 30 - May 2, 2004 | Moscone Center San Francisco, CA |
| Final Fantasy Concert 2004 | May 10, 2004 | Walt Disney Concert Hall Los Angeles, CA |
| E3 2004 | May 11-14, 2004 | Los Angeles Convention Center Los Angeles, CA |
| eigoManga Campus Invasion 2004 | May 14, 2004 | San Francisco State University San Francisco, CA |
| Califur 2004 | May 28-30, 2004 | Atrium Hotel Irvine, CA |
| FanimeCon 2004 | May 28-31, 2004 | San Jose McEnery Convention Center San Jose, CA |
| Pacific Media Expo 2004 | May 29-31, 2004 | Anaheim Hilton & Towers/Anaheim Convention Center Anaheim, CA |
| Hayward-Con 2004 | June 6, 2004 | Centennial Hall Hayward, CA |
| BotCon 2004 | June 19-20, 2004 | Pasadena Convention Center Pasadena, CA |
| Anime Expo 2004 | July 2-5, 2004 | Anaheim Convention Center Anaheim, CA |
| Comic-Con International: San Diego 2004 | July 22-25, 2004 | San Diego Convention Center San Diego, CA |
| Sacramento Anime & Manga Show 2004 | July 31 - August 1, 2004 | Sunrise Mall Citrus Heights, CA |
| Cosplay Ice Cream Social 2004 | August 8, 2004 | Small World Park Pittsburg, CA |
| Tales of Anime 2004 | August 28, 2004 | Cathedral Hill Hotel San Francisco, CA |
| JapanTown Anime Faire 2004 | September 11-12, 2004 | Radisson Miyako Hotel & Japan Center San Francisco, CA |
| Ani-Magic 2004 | October 1-3, 2004 | Hyatt Valencia / Santa Clarita Convention Center Valencia, CA |
| Super-Con 2004 | October 2, 2004 | Centennial Hall Hayward, CA |
| Metreon Festival of Anime 2004 | October 10, 2004 | Metreon San Francisco, CA |
| Rumble Invasion 2004 | October 23, 2004 | Tower Records San Mateo, CA |
| Yaoi-Con 2004 | October 29-31, 2004 | Westin San Francisco Airport San Francisco, CA |
| Akibiyori 2004 | November 6, 2004 | Ted Craig Regional Park Fullerton, CA |
| Anime Destiny 2004 | November 14, 2004 | University of California Berkeley Berkeley, CA |
| DragonFest 2004 | November 21, 2004 | Glendale Civic Auditorium Glendale, CA |
| Gen Con So Cal 2004 | December 2-5, 2004 | Anaheim Convention Center Anaheim, CA |
| Shukujitsu No Atsumari 2004 | December 12, 2004 | Mile Square Regional Park Fountain Valley, CA |
| Merry Otakumas 2004 | December 18, 2004 | Pasadena City College Pasadena, CA |
| Convention | Dates | Location |