Saint Adamnan was born in Ireland. Saint Ceolfrid persuaded him to adopt the Roman calendar for Easter. Adamnan worked to get Irish monks and monasteries to replace their Celtic practices with those of Rome. He convinced the Council of Birr that women should be exempt from wars and that women and children should not be taken prisoners or slaughtered caused the agreement to be called Adamnan's law. Died: at Iona, September 23, Feastday: September 23.