That depends on a number of things. The ‘original’ 12 includes Judas; in later lists he is replaced by Paul. Here are their names as prayed in Eucharistic Prayer I and their feast days: Peter and Paul, who share a joint feast day, 6/29, as well as their own days: The Conversion of Paul, 1/25 and the Chair of Peter, 2/22. Andrew, 11/30; James the Greater, 7/25; John, 12/27; Thomas, 7/3; James & Philip, 5/3; Bartholomew, 8/24; Matthew, 9/21; Simon & Jude, 10/28.
However, the Church gives the title ‘Apostle’ to Matthias, 5/12, who was elected by ‘The Eleven’ to replace Judas, and to Paul’s right-hand man, Barnabas, 6/10. The Bible does not individually call the following ‘Apostles’ but it does refer to them as such: Apollos [1 Corinthians 4:9; cf. 1:12; 3:4-4:6]; Paul called Silas, Timothy and himself “us apostles of Christ” [1 Thessalonians 2:7]; and called Andronicus and Junia, a married couple or brother & sister, and ‘relatives’ of Paul, “prominent among the apostles” [Romans 16:7]; he even warns against unnamed false apostles. [2 Corinthians 11:13; Revelation 2:2] In any case, of the two Prefaces for Apostles, here’s the one preferred on feast days of the ‘original’ Twelve.
All Apostles Are Disciples but not All Disciples are Apostles.
Biblically speaking, a disciple is one who strives to learn and live by a rabbi’s teaching or ‘discipline.’ An apostle is a disciple uniquely equipped and personally sent by the master with a special mission. No wonder the Bible even calls Jesus “the apostle and high priest of our confession.” [Hebrews 3:1b] For He was sent by the Father, fully equipped with all He needed to complete His mission to redeem the world. And although in their weekly audiences both Pope Saint John Paul II and Pope Benedict XVI quoted Saint Thomas Aquinas by calling Saint Mary Magdalene ‘the apostle to the Apostles,’ she has never been officially given that title by the Church. For as this Preface proclaims the main role of an Apostle is to shepherd the flock in the name of – and in place of – Jesus, the Good Shepherd. And while Christ violated many of the cultural and religious mores of His day: He spoke with women; touched women; allowed women to touch Him; let women sit at His feet and learn as His disciples, a role usually reserved to men; and came to the defense of women, He never numbered a woman, not Mary Magdalene or even His own Mother, among the Twelve; nor did He appoint any female shepherdesses to lead, feed or protect His flock. So, while Mary Magdalene is a Saint, she’s not an Apostle.
The Apostles continue to ‘watch over and protect’ the Church in two main ways. One is from their place in heaven, from where they intercede for us along with the Angels and all the other Saints. That’s one reason we single them out in every Eucharistic Prayer, along with the Blessed Virgin Mary and, of recent, Saint Joseph. We are, as the Letter to the Hebrews reminds, “we are surrounded by so great a cloud of witnesses” [12:1a] upon whom we can rely for guidance, direction and encouragement as we run the race they once ran … and won. Two, the Apostles continue to ‘watch over and protect through the successors of the Apostles, our Bishops. For through our Bishops, the Body of Christ on earth, the Church, is governed – and through them it must be led. So when the Pope is united with our Bishops, the ministry of Peter and his brother Apostles continues in the Church. Are we with – or against them?