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The Festival of Imam Tayyeb is a Taiyabi Fatimid Shia Dawoodi Bohra festival dedicated to the 21 st Ismaili Imam Taiyyab. It is birth day of Imam and occurs on the fourth day of the month of Rabi -ul-Akhar in the Islamic calendar. On the day special celebration is done by Ismaili/Taiyabi (specially by Dawoodi Bohra) and prayers made that their Imam comes out from seclusion and declares himself, such that "Khutbah" of Eid and Jumua(Friday) prayer can be read in same manner as done in the era of Fatimid Imams.
According to Ṭayyibī Musta‘lid Isma‘ili, Taiyab abi al-Qasim ((lang-ar|الطيب أبي القاسم)) was the 21st and (as some believe) the last Fatimid Imām, the hereditary leader of their community said to be in the direct line of ‘Ali). Abī l-Qāṣim was the son of the 20th Fatimid Imām, Mansur al-Amir Bi-Ahkamillah, ruler of Egypt from 1101-1130. He was born in Al-Moizziyyatul Qaherah on Sunday the 4th of Rabiul Aakher, 524H.
According to Ṭayyibī Musta‘lid tradition, before Tayyeb went into seclusion, his father Al-Amir had instructed Queen al-Hurrah Arwa al-Sulayhi in Yemen to anoint a vicegerent after the seclusion, the Da'i al-Mutlaq, who as the Imam's vicegerent has full authority to govern the community in all matters both spiritual and temporal.She appointed Dai Zoeb bin musa as First Dai .
References and External links 
- The Ismaili, their history and doctrine by Farhad Daftary
- Religion,learning and science by Young Lathan
- Medieval Islamic civilisation by Joseph w. Meri, Bacharach
- Sayyida Hurra: The Isma‘ili Sulayhid Queen of Yemenby Dr Farhad Daftary
- The Uyun al-akhbar is the most complete text written by an Ismaili/Tayyibi/Dawoodi 19th Dai Sayyedna Idris bin Hasan on the history of the Ismaili community from its origins up to the 12th century CE. period of the Fatimid caliphs al-Mustansir (d. 487/1094), the time of Musta‘lian rulers including al-Musta‘li (d. 495/1101) and al-Amir (d. 524/1130), and then the Tayyibi Ismaili community in Yemen...
See also