All Hallow's Eve: from Octave to Triduum

The 8-day Octave

Honoring our saints and purgatorial souls has been a practice since the earliest days of Christianity. 

• All Saints’ Day was formally established by Pope Gregory III in the 8th century.
• Pope Gregory IV extended it to the entire Church in the 9th century.
• Pope Sixtus IV of the 15th century expanded Allhallowtide from a triduum to a full octave: an 8-day observance. This extended period of reflection, from October 31 through November 8, emphasized the importance of remembering the dead souls and venerating the saints. The octave allowed for prolonged prayer, Holy Mass and penance to unite the community in their journey toward eternal life and spiritual purification. However... 
• Pope Pius XII eliminated this octave in 1955 during a period of liturgical reforms. However...
• Daily Mass-going Catholics memorialize this octave to obtain 8-daily plenary indulgences to free 8 suffering souls from purgatory.

Modern Triduum of Allhallowtide

Today, Catholics observe this triduum or 3-days as a special time of prayer, reflection, and remembrance. For many, the Hallowed Eve prior, All Saints’ Day and/or All Souls’ Day are spent in prayer, lighting candles, and visiting cemeteries. We seek indulgences to honor and pray for all our loved ones who have passed. Originally, the Hallowed Eve was spent in angels' and saints' costumes. It was common to see several Mother Marys, Sts Joan of Arc, Therese of Lisieux' and martyrs at dusk. These monks, priests, nuns, friars and even popes would role-play in jest, at outdoor bonfires rembering why we were made, what we can attain if we are "all in" and to discuss God's path for us.  

The Communion of Saints

At the core of Allhallowtide is the doctrine of the Communion of Saints. As the body of Christ, we find ourselves in 3-distinct groups:

• Church Militant: The faithful on earth, who being tested against sin. Our jobs are to help each other get to heaven through loving God and neighbor. 
• Church Triumphant: The saints and martyrs who art in heaven. These heroes of the faith have overcome sin and are in God’s eternal presence.
• Church Suffering: The souls in purgatory who undergo purification in preparation for heaven.

This 3-day Triduum is a time to express prayers, acts of charity and Holy Masses for both the living and the dead.  Through a boundless and loving God, we unite with the One who draws all of creation towards Himself.

Allhallowtide

This Triduum helps Catholics revisit the meaning of eternity, our saintly connections and our duty to help fellow souls in purgatory. Far from the social marketing of Halloween candy, pranks and costumes, this liturgical period invites us to deepen our commitment to holiness, to reflect on saints' lives, and to help those in between. Through our observances of All Hallows’ Eve, All Saints’ Day, and All Souls’ Day, believers are called to a renewed awareness of life’s transience and the hope of an eternal life through Christ. Allhallowtide, when embraced fully, becomes a solemn celebration of hope. As we journey through life, death, and beyond—we are reminded that earthly life is but a moment. Our bonds of faith will endure even past death and will unite us all in the mystery of God’s love and mercy. 

Sources:

Plenary indulgences: save the dates for a special opportunity to help the holy souls in purgatory November 1-8 | Catholic365

Rediscovering the Sacred Days of All Hallows' Eve, All Saints' Day, and All Souls' Day | Catholic Heroes

What is all hallow's eve a catholic perspective on halloween | Franciscan Friars