The holy service was held by Reverend Shio, the Incumbent of the Patriarchal Throne, together with the clergy, in the Sioni Cathedral of the Dormition.
According to church tradition, St. Nino arrived in Georgia in the 4th century, during the reign of King Mirian. The declaration of Christianity as the state religion is connected with St. Nino. Ninooba is celebrated twice, on June 1st and January 27th.