Religious Scholar

Fixed-hour Prayer is a practice common to adherents of most of the world's major religious traditions. While seldom compulsory, the practice of repeating certain prayers at certain times of the day brings a sense of harmony to believers and infuses the routine of daily living with the vital presence of the Divine. Here is a short introduction to a general Christian approach to Fixed-hour Prayer that I prepared for a spiritual teacher:

The Liturgy of the Hours in Christianity is also referred to as Fixed-Hour Prayer, The Daily Office, or The Canonical Hours. Below, is one traditional version (from Wikipedia, but it seems to be fine. :-)  Modern versions of this practice for lay people usually focus on just "morning, noon, and night" as fixed times for reflection, thanksgiving, seeking forgiveness, experiencing Love.

Phyllis Tickle, the leading expert on Fixed-Hour Prayer in the Episcopal tradition, writes:

"Fixed-hour prayer is the oldest form of Christian spiritual discipline and has its roots in the Judaism out of which Christianity came. When the Psalmist says, 'Seven times a day do I praise You,' he is referring to fixed-hour prayer as it existed in ancient Judaism." (Psalm 119: 164)

Traditional Roman Breviary[1]

• 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.)

[1]  a book of the Latin liturgical rites of the Catholic Church