Yawm‐e Ali — literally the “Day of Ali” — commemorates the birthday of Hazrat Ali, the cousin and son-in-law of Prophet Muhammad (peace be upon him and his family), and, in accordance with the Shia tradition of Islam, is the first in the line of hereditary Imams from the progeny of the Prophet.
According to tradition, Hazrat Ali was born on 13 Rajab in the year 599 CE. It is reported that on that day, Hazrat Ali’s mother visited the holy Ka‘ba to pray, and it was there that he was born.
In both Muslim tradition and modern scholarship, Hazrat Ali is recognised as the most important spiritual and intellectual authority in Islam after the Holy Prophet.
Click here to read more at The Ismaili http://www.theismaili.org.