Christians have observed the week before Easter as a time of special devotion since at least the fourth century. Pilgrims traveled to Jerusalem and followed the path of Jesus in his last days. From this beginning Palm Sunday, Maundy Thursday, Good Friday, and Holy Saturday developed. Holy Week is a liturgical entry into the last days of Jesus' earthly life, as well as the time and events leading up to his resurrection.
The Book of Common Prayer provides special liturgies for each of these days and readings for Monday, Tuesday, and Wednesday in Holy Week. Some parishes observe the service of Tenebrae on one of these days in Holy Week. In many dioceses, the diocesan clergy will make a reaffirmation of ordination vows. In the Diocese of Oklahoma this happens on Holy Monday at Saint Paul's Cathedral.
The three holy days, or Triduum, of Maundy Thursday, Good Friday, and The Great Vigil of Easter are at the heart of the Holy Week observance. In many Episcopal parishes, the liturgical color for Holy Week from Palm Sunday through Maundy Thursday is red. Holy Week ends at sundown on the Saturday before Easter, or with the celebration of the Easter Vigil.
HOLY WEEK WORSHIP TIMES
Worship to prepare our hearts...
Holy Monday
Eucharist with healing prayer - 7 pm
Holy Tuesday
Evensong - 7 pm
Holy Wednesday
Tenebrae - 7pm
for the ancient feasts of the church on...
Maundy Thursday
Agape Meal in the Parish Hall - 6:15 pm
Worship - 7 pm
Watch through the Night - 8 pm to 8 am
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Good Friday
Noon & 7 pm
Stations of the Cross at - 6:15 pm
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Easter Sunday
The Great Vigil of Easter 6:30 am
Holy Eucharist - 9;30 am
Holy Eucharist - 11:00 am
Adapted from https://www.episcopalchurch.org/glossary/holy-week/