September 20th (1663) was a Thursday. It's the 262nd day of the year (263rd in leap years) in the Gregorian calendar. There are 103 days left to the end of the year.
September 20th Holidays in History
» Christian feast day:
» Saint Agapitus e.g Agapitus (Western Christianity)
» Saint Eustace named Eustace (Western Christianity)
» John Coleridge Patteson (Anglicanism)
» Korean Martyrs, including Andrew Kim Taegon and Laurent-Marie-Joseph Imbert
» September 20 (Eastern Orthodox liturgics)
» Ragamuffin War (Brazilian state of Rio Grande do Sul)
» Independence Day of South Ossetia (not fully recognized)
» Public holidays in Thailand e.g National Youth Day (Thailand)
» The seventh day of the Eleusinian Mysteries, when the secret rites in the Telesterion began. (Ancient Greece)