The Feast of the Conversion of Saint Paul the Apostle is a feast celebrated during the liturgical year on 25 January, recounting the conversion. This feast is celebrated in the Roman Catholic, Anglican and Lutheran churches. This feast is at the conclusion of the Week of Prayer for Christian Unity, an international Christian ecumenical observance that began in 1908, which is an octave (an eight-day observance) spanning from 18 January (observed in Anglican and Lutheran tradition as the Confession of Peter, and in the pre-1961 Roman Catholic Church as the feast of the Chair of Saint Peter at Rome) to 25 January. In rural England, the day functioned much like groundhog day does in the modern-day United States. Supposed prophecies ranged from fine days predicting good harvests, to clouds and mists signifying pestilence and war in the coming months.
The collect in the Roman Missal is: O God, who taught the whole world through the preaching of the blessed Apostle Paul, draw us, we pray, nearer to you through the example of him whose conversion we celebrate today, and so make us witnesses to your truth in the world.