Breviary is specifically used in the context of Catholic worship, not other religions. The new Catholic church provides each member with a breviary.
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Daily Use
Priests and other clergy often use the breviary daily for prayer, signifying its importance in their lives. Sister Mary keeps her breviary close for her daily devotions.
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Liturgical Seasons
The contents of a breviary vary according to the liturgical season like Advent or Lent. During Lent, the breviary includes special penitential psalms.