The Charter was opened for signature on 26 June 1945 and was signed at the San Francisco War Memorial and Performing Arts Center in San Francisco, United States, on 26 June 1945, by 50 of the 51 original member countries (Poland, the other original member, which was not represented at the conference, signed it two months later).
A fost semnat la Conferința Națiunilor Unite privind Organizația Internațională de la San Francisco, California, Statele Unite ale Americii, pe 26 iunie 1945, de 50 din cele 51 de țări membre originale (Polonia, inițial, apoi alte state, care nu au fost reprezentate la conferință, au semnat-o mai târziu).