In the times of the Early Church, the Divine Office (Liturgy of the Hours) was celebrated across Christendom, when during the daylight (working) hours, bells rung across every village and township in a time of remembrance and gratitude. The hours are:
Matins (during the night, at midnight with some); also called Vigils or Nocturns or, in monastic usage, the Night Office
Lauds or Dawn Prayer (at Dawn, or 3 a.m.)
Prime or Early Morning Prayer (First Hour = approximately 6 a.m.)
Terce or Mid-Morning Prayer (Third Hour = approximately 9 a.m.)
Sext or Midday Prayer (Sixth Hour = approximately 12 noon)
None or Mid-Afternoon Prayer (Ninth Hour = approximately 3 p.m.)
Vespers or Evening Prayer ("at the lighting of the lamps", generally at 6 p.m.)
Compline or Night Prayer (before retiring, generally at 9 p.m.)
The Daily Office (Liturgies) can be found at
http://universalis.com/