Reformation Day offers a theological reason for its observance of Reformation Day, stating that: Alongside Reformation Day, many Protestant Churches observe All Hallow's Eve on October 31, the vigil of All Saint's Day. Reformation Day Reformation Day is a Protestant Christian religious holiday celebrated on 31 October, alongside All Hallows' Eve (Halloween) during the triduum of Allhallowtide, in remembrance of the onset of the Reformation. According to Philip Melanchthon, 31 October 1517 was the day German monk 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
All-Hallows-the-Great as All-Hallows-the-Less. The earliest surviving reference is in a charter of Bishop Gilbert of London in 1100–07, as "" (All Saints that is called Seamen's church, in London). Other early records refer to the church by a number of names, including All Hallows the More, All Hallows Thames Street, All Hallows in the Hay and All Hallows in the Ropery. According to John Stow, the latter descriptions were given because hay was sold at the nearby Hay Wharf and ropes were made in the high street. All-Hallows-the-Great was also the church of the German community of the nearby Steelyard, since