The Liturgy of the Hours as we have it today comprises five daily times of prayer:
+ a prayer upon beginning the day (Morning Prayer),
+ another for the mid-hours of the day (Daytime Prayer), another for the evening
+ one for the end of the day (Night Prayer),
+ and finally, a more meditative time (Office of Readings) that may be prayed at
any time of the day.
These five times of prayer are named “Hours,” not because each requires an hour of prayer, but because they build prayer into the cosmic hours of the day as they unfold. The shortest of these Hours may be prayed in five to ten minutes, the longest in fifteen to twenty minutes.