October 15th (1566) was a Saturday. It's the 288th day of the year (289th in leap years) in the Gregorian calendar. There are 77 days left to the end of the year.
October 15th Holidays in History
» Christian Feast Day:
» Teresa of Ávila called Saint Teresa of Ávila (Doctor of Church)
» Hedwig of Silesia or Saint Hedwig of Silesia
» Thecla of Kitzingen or Saint Thecla of Kitzingen
» October 15 (Eastern Orthodox liturgics)
» Arbor Day e.g National Tree Planting Day (Sri Lanka)
» The Equirria or 'October equus', sacrifice of a horse to Mars (god) called Mars. (Roman Empire)
» Global Handwashing Day (International observance known as International)
» Pregnancy and Infant Loss Remembrance Day (Canada and the United States)
» Earliest day on which Sweetest Day can fall, while October 21 is the latest; celebrated on the third Saturday in October. (Great Lakes region (North America) known as Great Lakes Region)