Christians continued the practice of using ashes as an external sign of repentance. Tertullian (c. 160 – c. 225) said that confession of sin should be accompanied by lying in sackcloth and ashes. The historian Eusebius (c. 260/265 – 339/340) recounts how a repentant apostate covered himself with ashes when begging Pope Zephyrinus to readmit him to communion.
John W. Fenton writes that "by the end of the 10th century, it was customary in Western Europe (but not yet in Rome) for all the faithful to receive ashes on the first day of the Lenten fast. In 1091, this custom was then ordered by Pope Urban II at the council of Benevento to be extended to the church in Rome. Not long after that, the name of the day was referred to in the liturgical books as “Feria Quarta Cinerum” (i.e., Ash Wednesday)."
The public penance that grave sinners underwent before being admitted to Holy Communion just before Easter lasted throughout Lent, on the first day of which they were sprinkled with ashes and dressed in sackcloth. When, towards the end of the first millennium, the discipline of public penance was dropped, the beginning of Lent, seen as a general penitential season, was marked by sprinkling ashes on the heads of all. This practice is found in the Gregorian Sacramentary of the late 8th century.[7] About two centuries later, Ælfric of Eynsham, an Anglo-Saxon abbot, wrote of the rite of strewing ashes on heads at the start of Lent.
The article on Ash Wednesday in the 1911 Encyclopædia Britannica says that, after the Protestant Reformation, the ashes ceremony was not forbidden in the Church of England, a statement that may explain the claim by Blair Meeks that the Anglican tradition "never lapsed in this observance". It was even prescribed under King Henry VIII in 1538 and under King Edward VI in 1550, but it fell completely out of use by soon after 1600. In 1536, the Ten Articles issued by authority of Henry VIII commended "the observance of various rites and ceremonies as good and laudable, such as clerical vestments, sprinkling of holy water, bearing of candles on Candlemas-day, giving of ashes on Ash-Wednesday". After Henry's death in January 1547, Thomas Cranmer, within the same year, "procured an order from the Council to forbid the carrying of candles on Candlemas-day, and the use of ashes on Ash-Wednesday, and of palms on Palm-Sunday, as superstitious ceremonies", an order that was issued only for the ecclesiastical province of Canterbury, of which Cranmer was archbishop.The Church Cyclopædia states that the "English office had adapted the very old Salisbury service for Ash-Wednesday, prefacing it with an address and a recital of the curses of Mount Ebal, and then with an exhortation uses the older service very nearly as it stood." The new Commination Office had no blessing of ashes and therefore, in England as a whole, "soon after the Reformation, the use of ashes was discontinued as a 'vain show' and Ash Wednesday then became only a day of marked solemnity, with a memorial of its original character in a reading of the curses denounced against impenitent sinners". The Protestant Episcopal Church in the United States of America, in the 19th century, observed Ash Wednesday: "as a day of fasting and humiliation, wherein we are publicly to confess our sins, meekly to implore God's mercy and forgiveness, and humbly to intercede for the continuance of his favour". In the 20th century, the Book of Common Prayer provided prayers for the imposition of ashes.