Reformation Day

Reformation Day
Painting of Martin Luther by Lucas Cranach the Elder
Observed by	Protestant communities
Date	31 October
Next time	31 October 2025 (2025-10-31)
Frequency	Annual

Part of a series on the
Reformation
Ninety-five Theses, written by Martin Luther in 1517
Precursors Peter Waldo and Waldensians John Wycliffe and Lollardy Jan Hus and Hussites Girolamo Savonarola and Piagnoni Arnold of Brescia and Arnoldists Gottschalk of Orbais Ratramnus Claudius of Turin Berengar of Tours and Berengarians Wessel Gansfort Johann Ruchrat von Wesel Johannes von Goch Friends of God Pataria
Beginning Ninety-five Theses Diet of Worms Luther Bible Magisterials Radicals
Contributing factors Western Schism Avignon Papacy Bohemian Reformation Northern Renaissance Christian humanism German mysticism Johannes Gutenberg and his printing press Erasmus Johann Reuchlin
Theologies of seminal figures Theology of Martin Luther Theology of Huldrych Zwingli Theology of John Calvin
Protestant Reformers Martin Luther Philip Melanchthon Huldrych Zwingli John Calvin Martin Bucer William Tyndale Andreas Karlstadt Theodore Beza George Buchanan Heinrich Bullinger Peter Martyr Vermigli William Farel François Hotman John Knox Hubert Languet Thomas Müntzer Balthasar Hubmaier Menno Simons Thomas Cranmer Richard Hooker Jacobus Arminius Roger Williams Many others
By location Germany Switzerland (Geneva/Zürich) England Scotland Netherlands Czech Lands Hungary Romania Slovenia Denmark–Norway and Holstein Sweden and Finland Iceland Estonia and Latvia Austria France Italy Poland-Lithuania Ireland
Major political leaders Henry VIII Elizabeth I Oliver Cromwell James VI and I William the Silent Gaspard II de Coligny Henry IV of France Jeanne d'Albret Stephen Bocskai Gabriel Bethlen Gustav II Adolf Frederick V, Elector Palatine Philip I of Hesse Electors of Saxony Frederick III John Frederick I
Counter-Reformation Catholic Church Council of Trent Counter-Reformation § Politics Censorship of the Bible § 16th century Anti-Protestantism Criticism Holy Roman Emperors Charles V Ferdinand II
Political and religious conflicts Thirty Years' War French Wars of Religion Eighty Years' War War of the Three Kingdoms German Peasants' War Wars of Kappel Schmalkaldic War
Art and literature Painting and sculpture Northern Mannerism Lutheran art German Renaissance Art Swedish art English art Woodcuts Art conflicts Beeldenstorm Building Influence on church architecture Literature Elizabethan Metaphysical poets Propaganda Welsh Scottish Anglo-Irish German Czech Swiss Slovak Sorbian Romanian Danish Bohorič alphabet Faroese Norwegian Swedish Finnish Icelandic Dutch Renaissance and Golden Age Folklore of the Low Countries 16th century Renaissance humanism 16th century in poetry 16th century in literature Theater English Renaissance theatre Pastoral Morality History Tragedy Revenge
Music Forms Hymnody of continental Europe Music of the British Isles Hymn tune Lutheran chorale Lutheran hymn Anglican church music Exclusive psalmody Scottish church music Normative principle Anglican chant Homophony vs. Polyphony Falsobordone Verse anthem Liturgies Reformed worship Calvin's liturgy Formula missae Deutsche Messe Liturgical Struggle Ecclesiastical Latin Lutheran and Anglican Mass in music Cyclic mass vs. Paraphrase mass Roman vs. Sarum Rites Sequence (retained by Lutherans, mostly banned by Trent) Hymnals First and Second Lutheran hymnals First Wittenberg hymnal Ausbund Swenske songer Thomissøn's hymnal Book of Common Prayer Metrical psalters Book of Common Order Souterliedekens Genevan Psalter Scottish Psalter Whole Book of Psalms
Conclusion and commemorations Conclusion Confessionalization with subsequent Protestant orthodoxy Peace of Westphalia Simultaneous rise of Pietism and Rationalism Monuments Reformation Wall Luther Monuments Calendrical commemoration Reformation Day Lutheran Anglican
Protestantism
v t e

Reformation Day is a Protestant Christian religious holiday celebrated on 31 October in remembrance of the onset of the Reformation.

According to Philip Melanchthon, 31 October 1517 was the day Martin Luther nailed his Ninety-five Theses on the door of the All Saints' Church in Wittenberg, Electorate of Saxony, in the Holy Roman Empire. Historians and other experts on the subject argue that Luther may have chosen All Hallows' Eve on purpose to get the attention of common people, although that has never been proven. Available data suggest that 31 October was the day when Luther sent his work to Albert of Brandenburg, the Archbishop of Mainz. This has been verified; it is now regarded as the start of the Reformation alongside the unconfirmed (Melanchthon appears to be the only source for that) nailing of the Ninety-five Theses/grievances to All Saints' Church's door on the same date.

The holiday is significant for the Lutheran and Reformed Churches, although other Protestant communities also tend to commemorate the day. The Roman Catholic Church recognized it only recently, and often sends its official representatives in ecumenical spirit to various commemoration events held by Protestants. It is lawfully and officially recognized in some states of Germany and sovereign countries of Slovenia and Chile. In addition, countries like Switzerland and Austria provide specifics in laws pertaining to Protestant churches, while not officially proclaiming it a nationwide holiday.