Birth of Muhammad Taqi (ninth Shia leader), Rajab 10. This date in the Hijri calendar marks the birth anniversary of Muhammad Taqi, recognized the ninth leader in Twelver Shia tradition. Historical accounts indicate his birth took place in the year AH in the city of Medina. The birth of Muhammad Taqi is observed a religious occasion among Twelver Shia communities. The day is commemorated in some Shia societies with religious gatherings and ceremonies, reflecting on his role in the history of this branch of Islam.