It is easy to think that uniformity is more valuable than diversity in unity. Through the centuries the Church in Rome allowed for different liturgical calendars to flourish which sort of exists down until today. AND this is the beauty of being Catholic. Lest we forget, the Church Universal allows for a variety of liturgical observances in local churches and religious orders in addition to the ones designated for the “person in the pew” by the Supreme Pontiff in the Roman Missal. Life does not need to be so restricted to think one way is better or more exclusive than the another. For example, consider the various observances of All Saints and All Souls noted below (if I am missing a group let me know). Benedictines and Dominicans celebrate All Saints and All Souls on November 1 & 2 respectively and days dedicated to the saints and souls of their religious families.
The Observance of All Saints and Blesseds in Various Orders
November 5, Society of Jesus
November 7, Order of Preachers
November 13, Augustinians, Benedictines, Cistercians, Order of Prémontré
November 14, Order of Carmelites Discalced & Order of Carmelites
November 29, Franciscan Family
The Commemoration of All Souls in Various Orders
November 3, Society of Jesus
November 8, Order of Preachers
November 13, Carthusians
November 14, Benedictines, Cistercians
November 15, Order of Carmelites Discalced & Order of Carmelites
November 25, Franciscan Family
REQUIEM aeternam dona eis, Domine, et lux perpetua luceat eis. Requiescant in pace. Amen.