This hour is now described more generally as the "midafternoon prayer" and may be said whenever convenient during the day, or omitted entirely. However, bishops and priests are still expected to recite the full sequence of hours, as closely as possible to the traditional time of day.
In the Eastern Orthodox and Greek Catholic Churches the office of the Ninth Hour is normally read by a single Reader and has very little variation in it. Three fixed psalms are read at the Third Hour: Psalms 83, 84, and 85 (LXX). The only variable portions for most of the year are the Troparia (either one or two) and Kontakion of the Day. The service ends with the Prayer of the Ninth Hour by Saint Basil the Great.
During Great Lent a number of changes in the office take place. On Monday through Thursday, after the three fixed psalms, the Reader says a kathisma from the Psalter. The Troparion of the Day is replaced by special Lenten hymns that are chanted with prostrations. Then a portion of the Ladder of Divine Ascent may be read. The Kontakion of the Day is replaced by special Lenten troparia. Near the end of the Hour, the Prayer of St. Ephraim is said, with prostrations.
During Holy Week, on Great Monday, Tuesday and Wednesday, the services are similar to those during Great Lent, except that there is no kathisma, and instead of the normal Lenten hymns which replace the Kontakion, the Kontakion of the day (i.e., that day of Holy Week) is chanted. On Great Thursday and Saturday, the Little Hours are more like normal. On Great Friday, the Royal Hours are chanted.
During the Lesser Lenten seasons (Nativity Fast, Apostles' Fast and Dormition Fast) the Little Hours undergo changes similar to those during Great Lent, except the Lenten hymns are usually read instead of chanted, and there are no kathismata. In addition, on weekdays of the Lesser Fasts, an Inter-Hour (Greek: Mesorion) may be read immediately after each Hour (at least on the first day of the Fast). The Inter-Hours may also be read during Great Lent if there is to be no reading from the Ladder of Divine Ascent at the Little Hours. The Inter-Hours follow the same general outline as the Little Hours, except they are shorter.
The remainder of this article uses the Catholic Encyclopedia of 1917; note that it describes the office before the reforms of the Second Vatican Council; the numbering system of psalms is that of the Septuagint and are said in Latin:
Saint Clement of Alexandria and likewise Tertullian, as early as the end of the second century, expressly mention the Canonical Hours of Terce, Sext, and None, as specially set apart for prayer. Tertullian says explicitly that we must always pray, and that there is no time prescribed for prayer; he adds, nevertheless, these significant words: "As regards the time, there should be no lax observation of certain hours—I mean of those common hours which have long marked the divisions of the day, the third, the sixth, and the ninth, and which we may observe in Scripture to be more solemn than the rest.
Clement and Tertullian in these passages refer only to private prayer at these hours. The Canons of Hippolytus also speak of Terce, Sext, and None, as suitable hours for private prayer; however, on the two station days, Wednesday and Friday, when the faithful assembled in the church, and perhaps on Sundays, these hours were recited successively in public. St. Cyprian mentions the same hours as having been observed under the Old Law, and adduces reasons for the Christians observing them also. In the fourth century there is evidence to show that the practice had become obligatory, at least for the monks.
The prayer of Prime, at six o'clock in the morning, was not added until a later date, but Vespers goes back to the earliest days. The texts we have cited give no information as to what these prayers consisted of. Evidently they contained the same elements as all other prayers of that time—psalms recited or chanted, canticles or hymns, either privately composed or drawn from Holy Writ, and litanies or prayers properly so-called.
In the Peregrinatio ad loca sancta of Etheria, (end of 4th century), There is a more detailed description of the Office of None. It resembles that of Sext, and is celebrated in the basilica of the Anastasis. It is composed of psalms and antiphons; then the bishop arrives, enters the grotto of the Resurrection, recites a prayer there, and blesses the faithful. During Lent, None is celebrated in the church of Sion; on Sundays the office is not celebrated; it is omitted also on Holy Saturday, but on Good Friday it is celebrated with special solemnity. But it is only in the succeeding age that we find a complete description of None, as of the other offices of the day.
In the Roman Liturgy the office of None is likewise constructed after the model of the Little Hours of the day; it is composed of the same elements as in the Rule of St. Benedict, with this difference: that instead of the three psalms (125-127), the three groups of eight verses from Psalm 118 are always recited. There is nothing else characteristic of this office in this liturgy. The hymn, which was added later, is the one already in use in the Benedictine Office—Rerum Deus tenax vigor. In the monastic rules prior to the tenth century certain variations are found. Thus in the Rule of Lerins, as in that of St. Caesarius, six psalms are recited at None, as at Terce and Sext, with antiphon, hymn and capitulum.
St. Aurelian follows the same tradition in his Rule Ad virgines, but he imposes twelve psalms at each hour on the monks. St. Columbanus, St. Fructuosus, and St. Isidore adopt the system of three psalms Like St. Benedict, most of these authors include hymns, the capitulum or short lesson, a versicle, and an oratio. In the ninth and tenth centuries we find some additions made to the Office of None, in particular litanies, collects, etc.
The writers of the Middle Ages have sought for other mystical explanations of the Hour of None. Amalarius of Metz (III, vi) explains at length, how, like the sun which sinks on the horizon at the hour of None, man's spirit tends to lower itself also, he is more open to temptation, and it is the time the demon selects to try him. For the texts of the Fathers on this subject it will suffice to refer the reader to the above-mentioned work of Cardinal Bona (c. ix). The same writers do not fail to remark that the number nine was considered by the ancients an imperfect number, an incomplete number, ten being considered perfection and the complete number. Nine was also the number of mourning. Among the ancients the ninth day was a day of expiation and funeral service—novemdiale sacrum, the origin doubtless of the novena for the dead.
As for the ninth hour, some persons believe that it is the hour at which our first parents were driven from the Garden of Paradise. In conclusion, it is necessary to call attention to a practice which emphasized the Hour of None—it was the hour of fasting. At first, the hour of fasting was prolonged to Vespers, that is to say, food was taken only in the evening or at the end of the day. Mitigation of this rigorous practice was soon introduced. Tertullian's famous pamphlet De jejunio, rails at length against the Psychics (i. e. the orthodox Christians) who end their fast on station days at the Hour of None, while he, Tertullian, claims that he is faithful to the ancient custom. The practice of breaking the fast at None caused that hour to be selected for Mass and Communion, which were the signs of the close of the day. The distinction between the rigorous fast, which was prolonged to Vespers, and the mitigated fast, ending at None, is met with in a large number of ancient documents (see Fasting).
, s.v., None