Adoption of the Gregorian Calendar

Updated February 21, 2017 | Factmonster Staff

The Gregorian reform was not adopted throughout the West immediately

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Year Country
1582 Catholic states of Italy, Portugal, Spain, Belgium, Holland, and Poland
1584 German and Swiss Catholic states
1587 Hungary
1700 German, Swiss, and Dutch Protestant States, Denmark, and Norway
1752 Great Britain and its possessions (including the American colonies)
1873 Japan
1875 Egypt
1918 Russia
1924 Greece
1926 Turkey
1949 China
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