Complex sentence: In some Anglican churches, a type of unbleached linen or muslin known as "Lenten array" is worn during the first three weeks of Lent, crimson is worn during Passiontide, and on holy days, the colour proper to the day is worn.
Split into simpler sentences: In some Anglican churches, a type of unbleached linen or muslin known as Lenten array is used during the first three weeks of Lent, and crimson during Passiontide. On holy days, the colour proper to the day is worn.