Weekly Shōnen Sunday (Japanese: 週刊少年サンデー, Hepburn: Shūkan Shōnen Sandē) is a weekly shōnen manga magazine published in Japan by Shogakukan since March 1959. Contrary to its title, Weekly Shōnen Sunday issues are released on Wednesdays. Weekly Shōnen Sunday has sold over 1.8 billion copies since 1986, making it the fourth best selling manga magazine, only behind Weekly Shōnen Jump, Weekly Shōnen Magazine and Weekly Young Jump. Source: Wikipedia (en)