📖 Biblical Definition
Reformation Sunday is the Protestant observance commemorating Martin Luther’s posting of the Ninety-Five Theses on the door of the Castle Church in Wittenberg on October 31, 1517 — traditionally observed the last Sunday of October. It celebrates the recovery of the gospel from medieval accretions and the rallying cries that crystallized over the following century: sola Scriptura, sola fide, sola gratia, solus Christus, soli Deo gloria. Where Halloween cosplays death, Reformation Sunday confesses resurrection. Reformed and confessional Protestants read Luther, sing A Mighty Fortress, and rehearse the doctrines that pulled the church back to Scripture. It is a family and ecclesial reminder that the church is always reforming — ecclesia reformata, semper reformanda.
📜 Webster 1828 Definition
Sunday commemorating Luther's 95 Theses.
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The Protestant observance commemorating the Reformation — typically the Sunday on or before October 31, the date of Luther's 1517 posting of the 95 Theses; a day for celebrating the gospel's recovery, the five solas, and Scripture's authority restored.
📖 Key Scripture
Romans 1:16-17 — "For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation... For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith."
Galatians 1:8-9 — "But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed."
2 Timothy 3:16-17 — "All scripture is given by inspiration of God."
⚠️ Modern Corruption
Reduced to triumphalism; the right note is gratitude for the gospel, not animus against Catholics.
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Reformation Sunday is for gratitude, not pride. The gospel was recovered; we are recipients, not heroes. Mark the day; teach the solas; pray for ongoing reformation. Always reforming.
🔗 Greek & Hebrew Roots
Latin reformatio — re-shaping.
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['Latin', '—', 'reformatio', 'reformation']
['Greek', 'G3346', 'metatithēmi', 'to transfer, change']
Usage
"Teach the five solas on Reformation Sunday."
"Always reforming; never finished."