15 Ga Sha'ban; Ranar Haihuwar Imam Al-Mahdi Mai Albarka

Imam al-Mahdi (AS) ya zama Imam bayan shahadar mahaifinsa Imam al-Hasan al-'Askari (AS) a shekara ta 260 hijirya (874 miladiyya), yana da shekaru biyar. Tun daga wannan lokacin har zuwa shekara ta 329 hijirya (941 miladiyya), yana hulɗa da mabiyansa ta hanyar Wakilansa Huɗu. Bayan haka, Babbar ɓoyewarsa  (Ghaiba) ta fara, wanda a cikin wannan zamani, shugabanci kai tsaye na al'ummar Shi'a yana hannun malaman addini ne.