Knowing the Imams Volume 6 contains a description of the hajj and umra pilgrimages of the Prophet, a detailed discussion of the Farewell Pilgrimage and the preparation for the event at Ghadir Khum and a detailed explanation of how changing the months from lunar to solar is unlawful; how colonization affected national and tribal customs, changed Islamic history, altering manuscripts and the language of Islam into foreign ones, and adjusted the religious time to Greenwich Mean Time; how the decline of the Pahlavi Dynasty brought with it the abrogation of the history of Muhammad; documentary information with an analysis of when the revenue operation of the colonializing National Council Assembly wanted to change the lunar date to the traditional solar year in three successive stages; and commemorations and anniversaries according to the lunar calendar.