In particular, they are especially active during the triduum of Hallowmas.

A triduum is a religious observance lasting three days.

They are most typically operated in the days preceding the triduum of Hallowmas.

Henry himself observed the Easter Triduum in that year with some display.

(6 April, his death date, was not used because it would too often conflict with the Easter Triduum.)

During the Easter Triduum (usually a public holiday), some local terrestrial television and radio stations closedown.

Halloween begins the triduum of Hallowmas.

It is the first part of an orchestral triptych called "Triduum," composed for the London Symphony in 1996.

In some Protestant denominations, the Triduum begins with an evening worship service on Maundy Thursday.

The first Mother of Perpetual Help Shrine in the church was blessed on December 7, 1873 during the first public triduum under her name.

Tournaments might be held at all times of the year except the penitential season of Lent (the forty days preceding the Triduum of Easter).

In his case, the source of the inspiration is Roman Catholicism, and the three sections of "Triduum" are meant to evoke the days leading to Easter.

The best-known example today is the liturgical Paschal Triduum (the three days from the evening of Maundy Thursday to Easter Sunday).

Easter Monday (Monday following Easter Sunday, not part of the Easter Triduum)

Hallowmas - The Triduum of The Saints (Saint Cyril of Alexandria Church)

The Easter Triduum culminates with the celebration of Jesus' resurrection, the most solemn observance of which is the Easter Vigil.

Maundy Thursday, Good Friday, and Holy Saturday are sometimes referred to as the Easter Triduum (Latin for "Three Days").

The second part of "Triduum," a Cello Concerto, is for Good Friday, and "The Vigil" is for the night before Easter Sunday.

The triduum begins on the evening before Good Friday with Mass of the Lord's Supper, celebrated with white vestments, and often includes a ritual of ceremonial footwashing.

The Agnesians hold a triduum which means three-day prayer on the feast of their three main patron saints, St. Benedict, St. Scholastica and St. Agnes, respectively.

The triduum in honour of Our Lady of Salambao and the two other patron saints San Pascual Baylon and Santa Clara, is celebrated every 17th, 18th, and 19th of May.

The Paschal Mystery, celebrated in the Sacred Triduum, is seen as a liturgical axis and source of Christian life and a fulcrum of the Neocatechumenate which leads to "rediscovery" of Christian initiation.

But when it came time to consider speaking about the scandals during the Easter triduum - which began with Holy Thursday and continues through Easter - Monsignor Hippee said, "My heart and my head cannot be there."

This "Antiphonarium Romanum compendiose redactum ex editionibus typicis" etc., includes, however, the chants for the Masses of Christmas, the triduum of Holy Week, and other desired Offices, and is issued in a single volume.

But the Lessons of Matins (First Nocturn) in the triduum of Holy Week, styled "Lamentations", have a melody proper to themselves, which is not therefore merely indicated but is placed immediately with the texts of the Lessons.