This group masterminded the revolution in November 1917?

Vladimir Lenin and the Bolshevik Party masterminded the revolution in November 1917. It is called the October Revolution, though, because it happened on October 25-26, 1917 according to the Julian calendar then in use in Russia. According to the Gregorian calendar then in use in western nations, it was November, because the Julian calendar was 13 days behind the Gregorian calendar.