Swedish calendar

The Swedish calendar, which was in use from 1 March 1700 to the February 30, 1712, corresponded to the Julian calendar with a difference of one day.

In November 1699 Charles XII. Decided to introduce in Sweden the Gregorian calendar with the year 1700. However, one did not want to skip the entire difference of eleven days, as was done already in some other countries, but omit the leap into the next eleven leap years and to request the Gregorian calendar on 1 March 1740.

30 days in February

The leap day was according to the plan in 1700 omitted, but in the following leap year (1704 and 1708 ), no days are skipped. In January 1711 Charles XII. Decided to abandon the Swedish calendar, since it was not used by any other nation, and returned to the old calendar. In the year 1712 a leap year, February, another leap day was added in addition to the February 29, so that the February 1712 had now (see 30 February), 30 days.

Transition to the Gregorian calendar

1753, Sweden introduced by a further reform of the calendar and let immediately following March 1 to February 17. Thus, the Gregorian calendar was indeed in fact valid, but Sweden accepted until 1844 the Gregorian rules for calculating the date of Easter.

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