Feasts of STS Simon and Jude!
Saint Simon, not St. Simon Peter, was a zealot before meeting Christ. The zealots were Jews who had great zeal for honoring God and maintaining purity of religion, but in their zeal they would assassinate nobles, filling the temple with bloodshed and profanities. After meeting Christ and converting, St. Simon became zealous for Christ, in a good way. After Pentecost he went out and preached in Egypt.
Saint Jude Thaddaeus (Judas, not the Iscariot), the brother of the apostle St. James the Lesser, was a cousin of the Lord, nephew to the Blessed Virgin Mary. This can be drawn from the passage in Scripture from Matthew 13:55, “Is he not the carpenter’s son? Is not his mother named Mary and his brothers James, Joseph, Simon, and Judas?” The word “brothers” in Greek is adelphoi, which also means “cousin” or “relative” because there is no word for cousin in Hebrew. After receiving the Holy Spirit, he went to preach in Mesopotamia.
Saint Jude wrote an epistle, found in the New Testament. He wrote not to a particular person or audience, but rather to Christians as a whole, exhorting them to, “contend for the faith that was once for all handed down to the holy ones.” He warns against false teachings and encourages Christians to keep the faith pure.
Excerpts from the Divine Mercy Message.