Today the Western Church observed the Feast of the Holy Trinity. But this day is also set aside to remember St. Barnabas, the Apostle, whose commemoration is then transferred to tomorrow:
Almighty God, Your faithful servant Barnabas sought not his own renown but gave generously of his life and substance for the encouragement of the apostles and their ministry. Grant that we may follow his example in lives given to charity and the proclamation of the Gospel; through Your Son, Jesus Christ, our Lord, who lives and reigns with You and the Holy Spirit, one God, now and forever.
Is 42:5-12 / Acts 11:19-30; 13:1-3 / Mark 6:7-13
It is truly good, right, and salutary that we should at all times and in all places give thanks to You, holy Lord, almighty Father, everlasting God, for You have mightily governed and protected Your holy Church, in which the blessed apostles and evangelists proclaimed Your divine and saving Gospel. Therefore with patriarchs and prophets, apostles and evangelists, with Your servant Barnabas, and with all the company of heaven, we laud and magnify Your glorious name, evermore praising You and saying: Holy, holy, holy...