The 'Year Nine' is an abbreviation of 1269 A.H. The beginning of the Year Nine occurred about two months after His (Bahá'u'lláh's) imprisonment in that dungeon. We do not know the exact time He received this first intimation... We therefore regard the entire Year Nine as a Holy Year, and the emphasis should be placed ... on the entire year, which started in October, 1852. This means our Centenary Year of Celebration will be from October, 1952 to October, 1953." (From a letter written on behalf of Shoghi Effendi, ‘Directives from the Guardian’)