1st January » Russia begins using the Anno Domini era and no longer uses the Anno Mundi era of the Byzantine Empire.
26th January » The Richter magnitude scale e.g magnitude 9 Cascadia Earthquake takes place off the west coast of the North America, as evidenced by Japanese records.
27th February » The island of New Britain is discovered.
28th February » Today is followed by March 1 in Sweden, thus creating the Swedish calendar.
1st March » 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.