Slovenia is celebrating Reformation Day, a public holiday in memory of the Reformation Movement, an era during which the first books in Slovenian were printed, representing the formal beginnings of modern Slovenian language.
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.
Slovenian famous reformer was Primož Trubar.
Primož Trubar was a Slovene Protestant Reformer of the Lutheran tradition, mostly known as the author of the first Slovene language printed book, the founder and the first superintendent of the Protestant Church of the Duchy of Carniola, and for consolidating the Slovenian language. Trubar introduced The Reformation in Slovenia, leading the Austrian Habsburgs to wage the Counter-Reformation, which a small Protestant community survived. Trubar is a key figure of Slovenian history and in many aspects a major historical personality.