For Western Christians of the Catholic, Lutheran and Anglican traditions, Advent signifies preparation for a threefold coming of Christ: firstly in the Incarnation at Bethlehem, then in a perpetual sacramental presence in the Eucharist, and thirdly at his Second Coming and final judgement. Furthermore, Advent is a time to focus on his present coming to mankind in the Word and Sacraments.

It is not known when the period of preparation for Christmas that is now called Advent began, though it was certainly in existence from about 480; the novelty introduced by the Council of Tours of 567 was to order monks to fast every day in the month of December until Christmas. According to J. Neil Alexander, it is "impossible to claim with confidence a credible explanation of the origin of Advent".

Associated with Advent as a time of penitence was a period of fasting, known also as St Martin's Lent or the Nativity Fast. According to Saint Gregory of Tours the celebration of Advent began in the fifth century when the Bishop Perpetuus directed that starting with the St. Martin's Day on 11 November until Christmas, one fasts three times per week; this is why Advent was sometimes also named "Lent of St. Martin". This practice remained limited to the diocese of Tours until the sixth century.

The Council of Macon held in 581 adopted the practice in Tours. Soon all France observed three days of fasting a week from the feast of Saint Martin until Christmas. The most devout worshipers in some countries exceeded the requirements adopted by the council, and fasted every day of Advent.

The first clear references in the Western Church to Advent occur in the Gelasian Sacramentary, which provides Advent Collects, Epistles, and Gospels for the five Sundays preceding Christmas and for the corresponding Wednesdays and Fridays. The homilies of Gregory the Great in the late sixth century showed four weeks to the liturgical season of Advent, but without the observance of a fast. Under Charlemagne in the ninth century, writings claim that the fast was still widely observed.

In the 13th century, the fast of Advent was not commonly practised although, according to Durand of Mende, fasting was still generally observed. As quoted in the bull of canonisation of St. Louis, the zeal with which he observed this fast was no longer a custom observed by Christians of great piety. It was then limited to the period from the feast of Saint Andrew until Christmas Day, since the solemnity of this apostle was more universal than that of St. Martin.

When Pope Urban V ascended the papal seat in 1362, he imposed abstinence on the papal court but there was no mention of fasting. It was then customary in Rome to observe five weeks of Advent before Christmas. The Ambrosian Rite has six. The Greeks show no more real consistency: Advent was an optional fast that some begin on 15 November, while others begin on 6 December or only a few days before Christmas.

The liturgy of Advent remained unchanged until the

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The theme of readings and teachings during Advent is often the preparation for the Second Coming and the Last Judgement. While the Sunday readings relate to the first coming of Jesus Christ as saviour as well as to his Second Coming as judge, traditions vary in the relative importance of penitence and expectation during the weeks in Advent.
Since approximately the 13th century, the usual liturgical colour in Western Christianity for Advent has been violet; Pope Innocent III declared black to be the proper colour for Advent, though Durandus of Saint-Pourçain claims violet has preference over black. The violet or purple colour is often used for antependia, the vestments of the clergy, and often also the tabernacle. On the third Sunday of Advent, Gaudete Sunday, rose may be used instead, referencing the rose used on Laetare Sunday, the fourth Sunday of Lent. A rose-coloured candle in Western Christianity is referenced as a sign of joy (Gaudete) lit on the third Sunday of Advent.

While the traditional colour for Advent is violet, there is a growing interest in and acceptance, by some Christian denominations of blue as an alternative liturgical colour for Advent, a custom traced to the usage of the Church of Sweden (Lutheran) and the Mozarabic Rite, which dates from the 8th century.

The Lutheran Book of Worship lists blue as the preferred colour for Advent, while the Methodist Book of Worship and the Presbyterian Book of Common Worship identify purple or blue as appropriate for Advent. Proponents of this new liturgical trend argue that purple is traditionally associated with solemnity and somberness, which is fitting to the repentant character of Lent. There has been an increasing trend in Protestant churches to supplant purple with blue during Advent as it is a hopeful season of preparation that anticipates both Bethlehem and the consummation of history in the Second Coming of Jesus Christ. This colour is often called "Sarum blue", referring to its purported use at Salisbury Cathedral. Many of the ornaments and ceremonial practices associated with the Sarum rite were revived in the Anglican Communion in the late 19th and early 20th centuries, as part of the Anglo-Catholic Oxford Movement in the Church of England. While Anglican liturgist Percy Dearmer does not object to the use of blue during Advent, he did not attribute its use to Sarum. "[T]he so-called Sarum uses are really one-half made up from the fancy of nineteenth-century ritualists."

While the Sarum use was influential, different dioceses, including Salisbury, used a variety of coloured vestments. "In the Sarum Rite the Advent colour was red, but it could very well have been the red-purple known as murray ..."

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