Complex sentence: Luther is honoured on 18 February with a commemoration in the Lutheran Calendar of Saints and a feast day in the Episcopal (United States) Calendar of Saints; in the Church of England's Calendar of Saints he is commemorated on 31 October.
Split into simpler sentences: Luther is honoured on 18 February with a commemoration in the Lutheran Calendar of Saints and in the Episcopal (United States) Calendar of Saints. In the Church of England's Calendar of Saints he is commemorated on 31 October.