The Swedish Calendar in use from




was one day ahead of the Julian calendar and ten days behind the Gregorian calendar.

Thirty days in February 1712.

In November

it was decided that

would begin to adopt the New Style, or Gregorian calendar, starting in 1700. The plan was to skip all leap days in the period 1700 to 1740, thus gradually approaching the Gregorian Calendar over 40 years. According to plan

was omitted in 1700, but no further reductions were made in the following years. In January

, King

declared that Sweden would abandon the calendar, which wasn't in use by any other nation nor had achieved its objective, in favor of a return to the Old Style. An extra day was added to February in the leap year of 1712, thus giving it a unique

. In

Sweden introduced the New Style, whereby the leap of 11 days was accomplished with

being followed by

. Despite this, Sweden did not accept the Gregorian rules for determining Easter until

; from 1753 until then, Sweden observed Easter on the Sunday after the first astronomical full moon after the true vernal equinox.

See also

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