Music and the Liturgical Calendar This series contains documents relating to Howell's extensive work putting on services and week-long events during the liturgical calendar, as well as providing and conducting the music for them. These included his own creations such as Liturgical/Layfolks' Week, a week where parishes would receive a series of instructions and devotions to help them better understand the liturgy, as well as Psalm festivals and Holy Week celebrations. 20th century