22/7 may refer to: The number as an approximation of Approximations of Proof that exceeds Days of the year July 22 "Pi Approximation Day" or " Approximation Day" People 22/7 (group), a Japanese idol group 22/7 (TV series), Japanese anime series based on the Japanese idol group 22/7 See also Pi 2011 Norway attacks, referred to in Norway as 22 July or 22/7