Roman Martyrology-September 27th- on this date in various years-
At Aegea, during the persecution of Diocletian, the birthday of the holy martyrs Cosmas and Damian, brothers. After miraculously overcoming many torments from bonds, imprisonment, fire, crucifixion, stoning, arrows, and from being cast into the sea, they were beheaded. With them are said to have suffered three brothers: Anthimus, Leontius, and Euprepius.
At Paris, the birthday of St. Vincent de Paul, priest and confessor, founder of the Congregation of the Mission and of the Sisters of Charity, an apostolic man and father to the poor. Pope Leo XIII appointed this saint as the heavenly patron before God of all charitable societies in the world which in any way whatever draw their origin from him. His feast is celebrated on the 19th of July.