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Julian and Gregorian Calendars: Difference between revisions

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This list has been compiled from various sources (see the list of works consulted at the bottom of the page).  The reader will notice that there are sometimes more than one date for conversion for one particular jurisdiction. This is due to several factors. First, sometimes the sources do not agree and most do not give sources. In such cases, it might be impossible to determine the correct date of conversion.  Second, a jurisdiction may have made a conversion when the Julian date ended at the end of a year and the Gregorian date took effect in the new year. Some sources list the previous year as the year of conversion, whereas others list the new year as the year of conversion.  Third, parts of some jurisdictions may have converted, whereas other parts may have converted later. This is particularly true in Switzerland. Finally, a jurisdiction may have converted to the Gregorian, then back the Julian, then back to the Gregorian (e.g. Groningen).  In such cases, the researcher is advised to consult all the sources listed below.
This list has been compiled from various sources (see the list of works consulted at the bottom of the page).  The reader will notice that there are sometimes more than one date for conversion for one particular jurisdiction. This is due to several factors. First, sometimes the sources do not agree and most do not give sources. In such cases, it might be impossible to determine the correct date of conversion.  Second, a jurisdiction may have made a conversion when the Julian date ended at the end of a year and the Gregorian date took effect in the new year. Some sources list the previous year as the year of conversion, whereas others list the new year as the year of conversion.  Third, parts of some jurisdictions may have converted, whereas other parts may have converted later. This is particularly true in Switzerland. Finally, a jurisdiction may have converted to the Gregorian, then back the Julian, then back to the Gregorian (e.g. Groningen).  In such cases, the researcher is advised to consult all the sources listed below.


Year of adoption of the Gregorian Calendar. This means that the year given is the beginning year that the country/province/canton began using the Gregorian calendar and when you should start using the Gregorian feast day converter. Before that year, use the Julian converter.  For example, Albania used the Julian calendar until 1912, when it switched to the Gregorian. It should be noted that this chart lists only the year, not the date, of conversion.  For the exact date (which will be important!), the researcher is again advised to consult the sources listed below.
Year of adoption of the Gregorian Calendar. This means that the year given is the beginning year that the country/province/canton began using the Gregorian calendar and when you should start using the Gregorian feast day converter. Before that year, use the Julian converter.  For example, Albania used the Julian calendar until 1912, when it switched to the Gregorian. It should be noted that this chart lists only the year, not the date, of conversion.  For the exact date (which will be important!), the researcher is again advised to consult the sources listed below.<ref>Parise, Frank. The Book of Calendars. New York, New York: Facts on File, 1982. http://dpgi.unina.it/giudice/calendar/Adoption.html.</ref><ref>GenWiki contributors, "Gregorianischer Kalender," in ''GenWiki'', http://wiki-de.genealogy.net/Gregorianischer_Kalender, accessed 26 June 2018.</ref><ref>Wikipedia contributors, "Gregorian calendar," in ''Wikipedia: the Free Encyclopedia'', https://en.wikipedia.org/wiki/Gregorian_calendar#Adoption, accessed 26 June 2018.</ref><ref>Wikipedia contributors, "Adoption of the Gregorian calendar," in ''Wikipedia: the Free Encyclopedia'', https://en.wikipedia.org/wiki/Adoption_of_the_Gregorian_calendar, accessed 26 June 2018.</ref><ref>"The Gregorian calendar," in ''The Calendar FAQ'', https://www.tondering.dk/claus/cal/gregorian.php, accessed 26 June 2018.</ref><ref>"The Change from the Julian to the Gregorian Calendar," in ''Ancesteor Search'', http://www.searchforancestors.com/utility/gregorian.html, accessed 26 June 2018.</ref><ref>"Countries' Calendar Reform," in ''Calendars through the Ages'', http://www.webexhibits.org/calendars/year-countries.html, accessed 26 June 2018.</ref><ref>Professor Robert A. Hatch, "The Gregorian Conversion," in ''The Scientific Revolution'', http://users.clas.ufl.edu/ufhatch/pages/03-Sci-Rev/SCI-REV-Home/Historical-Research/Calendars/gregorian_calendar_history.html, accessed 26 June 2018.</ref>




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