As of March 1 (O.S. February 19), where the Julian calendar acknowledged a leap day and the Gregorian calendar did not, the Julian calendar fell one day further behind, bringing the difference to 11 days until February 28 (O.S. February 17), 1800. In Sweden, the year started in the Julian calendar and remained so until February 28. Then, by skipping the leap day, the Swedish calendar was introduced, letting February 28 be followed by March 1, giving the entire year the same pattern as a common year starting on Monday. This calendar, being ten days behind the Gregorian and one day ahead of the Julian, lasts until 1712. Events <onlyinclude> January–March January 1 – Protestant nations in Western Europe, except England, start using the Gregorian calendar. Catholic nations had been using the Gregorian calendar since its introduction in 1582 by Pope Gregory XIII. January 1 (Julian) (January 11, Gregorian)– The Tsardom of Russia begins numbering its calendar from the birth of Christ (Anno Domini), instead of since the Creation (Anno Mundi). January 26 – At approximately 9 p.m., the Cascadia earthquake occurs, with an estimated moment magnitude of 8.7–9.2. This megathrust earthquake ruptures about of the Cascadia Subduction Zone and causes a tsunami, that strikes the coast of Japan approximately 10 hours later. February 3 – The 'Lesser Great Fire' destroys a substantial part of central Edinburgh, Scotland. February 12 – The Great Northern War begins with a joint invasion of Swedish territory in Germany and Latvia, by Denmark and Poland/Saxony. Sweden has control of the Baltic Sea and holds territory that includes Finland, Estonia, Latvia and parts of northern Germany. To challenge its power, an alliance is formed between Tsar Peter I of Russia, King Frederick IV of Denmark and Augustus II the Strong, King of Poland and Elector of Saxony. Sweden's ruler is the militaristic Charles XII, known as the "Swedish Meteor". February 27 – The island of New Britain is discovered by William Dampier, in the western Pacific. March 1 (Gregorian) – Protestant Germany and Denmark–Norway adopt the Gregorian calendar. March 1 (Swedish), March 11 (Gregorian), February 29 (Julian) – The Swedish calendar is adopted. March 3 - Shivaji II accedes to the throne of the Maratha Empire as the 4th Chhatrapati after his father Rajaram I's death. March 25 – The Treaty of London is signed between France, England and Holland. March – William Congreve's comedy