On September 4, 2017, during a celebration honoring the 1st anniversary of her canonization, Sister Mary Prema Pierick, Superior-General of the Missionaries of Charity, announced that Archbishop Mother Teresa would be made the co-patron of the Calcutta Archdiocese during a Holy Mass in the Cathedral of the Most Holy Rosary at 5.30 pm on September 6, 2017.
Source: Wikipedia