December 20th (1566) was a Tuesday. It's the 354th day of the year (355th in leap years) in the Gregorian calendar. There are 11 days left to the end of the year.
December 20th Holidays in History
» Abolition of Slavery Day, also known as 'Cafre known as Fête des Cafres' (Réunion, French Guiana)
» Bo Aung Kyaw Day (Burma named Myanmar)
» Christian Calendar of saints called Feast Day:
» Dominic of Silos
» O antiphon O Clavis David e.g O Clavis
» Ursicinus of Saint-Ursanne
» Katharina von Bora (Lutheran)
» December 20 (Eastern Orthodox liturgics)
» Yaldā (Iran)
» UNRIC UN international days and observances named International Human Solidarity Day (International observance e.g International)