February 15 » Ferdinand III becomes Holy Roman Emperor.
February 18 » Eighty Years' War: Off the coast of Cornwall, England, a Spanish fleet intercepts an important Anglo-Dutch merchant convoy of 44 vessels escorted by six warships, destroying or capturing 20 of them.
May 26 » Pequot War: A combined English and Mohegan force under John Mason attacks a village in Connecticut, massacring approximately 500 Pequots.
January 26 » The 8.7–9.2 Mw Cascadia earthquake takes place off the west coast of North America, as evidenced by Japanese records.
February 27 » The island of New Britain is discovered by Europeans.
February 28 » Today is followed by March 1 in Sweden, thus creating the Swedish calendar.
March 1 » Sweden introduces its own Swedish calendar, in an attempt to gradually merge into the Gregorian calendar, reverts to the Julian calendar on this date in 1712, and introduces the Gregorian calendar on this date in 1753.
When copying data from this family tree, please include a reference to the origin: Mike Whitworth, "Whitworth Tree", database, Genealogy Online (https://www.genealogieonline.nl/whitworth-tree/I282514020836.php : accessed May 2, 2025), "Ichabod Wiswall (1637-1700)".
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