Determining the dates of change from the Julian calendar to the Gregorian calendar is not as easy as it seems it should be. Countries, and sometimes areas within countries, changed calendars over a period hundreds of years.
Pope Gregory XIII issued the papal bull Inter gravissimas on February 24, 1582, instituting the reform of the Julian calendar. Greece was the last European country to adopt the Gregorian calendar in 1923.
Country |
Start Year Jan 1 |
Last Julian Date |
First Gregorian Date |
---|---|---|---|
France (and Colonies) | December 9, 1582 | December 20, 1582 | |
France, Alsace | 16481 | 16482 | |
France, Artois | December 21, 1582 | January 1, 1583 | |
France, Loraine | December 9, 1582 | December 20, 1582 | |
France, Strasbourg | February 5, 16823 | February 16, 16824 | |
Great Britain (and Colonies), except Scotland | 1752 | September 2, 17525 | September 14, 17526 |
Great Britain, Scotland | 16007 | September 2, 17528 | September 14, 17529 |
Greece | September 14, 191610 February 15, 1923 |
September 28, 191611 March 1, 1923 |
|
Holy Roman Empire, Catholic states | 154412 | ||
Holy Roman Empire, Protestant states | 155913 | ||
Spain (and Colonies) | 155614 | October 4, 158215 | October 15, 158216 |
United States, Alaska Changed when United States took over control from Russia. Alaska skipped 11 days instead of 12 because it flipped over the dateline as it made the change. |
October 6, 1867 | October 18, 186717 | |
United States, British Colonies Changed with Great Britain. |
September 2, 175218 | September 14, 175219 | |
United States, French Colonies Changed with France. |
December 9, 1582 | December 20, 1582 | |
United States, Spanish Colonies Changed with Spain. |
October 4, 1582 | October 15, 1582 | |
Yugoslavia 1919 in the regions comprising the former Kingdoms of Serbia and Montenegro (present-day Kosovo, Montenegro, Serbia and Macedonia). The western and northern regions of what became Yugoslavia were already using the Gregorian calendar. For example, most of Slovenia adopted the Gregorian calendar at the same time as Austria in 1583. Coastal Croatia, which was at the time ruled by Venice, adopted the Gregorian calendar in 1582. Inland Croatia, ruled by the Habsburgs, adopted it in 1587 along with Hungary. The Gregorian calendar was used in Bosnia and Herzegovina since the 16th century by the Catholic population and was formally adopted for government use in 1878 following occupation by Austria-Hungary.20 |
March 4, 191921 | March 18, 191922 |
Footnotes
- “Julian and Gregorian Calendars Genealogy“. FamilySearch Wiki. Accessed July 2, 2019.
- “Julian and Gregorian Calendars Genealogy“. FamilySearch Wiki. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- Pattie, T.S. (1976) “An unexpected effect of the change in calendar in 1752“. British Library Journal.
- Pattie, T.S. (1976) “An unexpected effect of the change in calendar in 1752“. British Library Journal.
- John James Bond, “Handy-book of rules and tables for verifying dates with the Christian era“. Scottish decree on pp. xvii–xviii.
- Pattie, T.S. (1976) “An unexpected effect of the change in calendar in 1752“. British Library Journal.
- Pattie, T.S. (1976) “An unexpected effect of the change in calendar in 1752“. British Library Journal.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Gregorian calendar“. Wikipedia. Accessed July 2, 2019.
- “Gregorian calendar“. Wikipedia. Accessed July 2, 2019.
- “Gregorian calendar“. Wikipedia. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Gregorian calendar“. Wikipedia. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.
- “Change from the Julian Calendar to the Gregorian Calendar“. SearchforAncestors.com. Accessed July 2, 2019.