Calendar
Since we are using dates for some data in this web, we should be careful about the existance of two calendars.
The Julian Calendar or Old Style (OS) calendar & the Gregorian Calendar or New Style .
We are covering data from 1650 until 1850, approximately, from many nations. During this period, some nations still were using the Old Style calendar.
These are the nations we should be careful of and the date they changed to the Gregorian Calendar, in addition care must be taken where a date falls between January 1st and March as many Countries year started on March 25th (including England) or March 1st.
Country |
Adoption of Gregorian Calendar |
Adoption of 1 January as New Year |
Venice |
1582 |
1522 |
Spain |
1582 |
1556 |
France |
1582 |
1564 |
Dutch Republic |
1582 |
1583 |
Holy Roman Empire |
1583 |
1544 |
Portugal |
1582 |
1556 |
Southern Netherlands |
1582 |
1556 |
Prussia |
1700 |
1559 |
Denmark |
1700 |
c 1310 |
Scotland |
1752 |
1600 |
British Empire |
1752 |
1752 |
Sweden |
1753 |
1559 |
Russia |
1918 |
1700 |
To convert Gregorian dates to Julian and visa-versa use the table below by finding the required date and:
For a Julian to Gregorian convertion add the difference to the Julian Date
For a Gregorian to Julian convertion Subtract the difference from the Gregorian date.
Gregorian Date Range |
Julian Date Range |
Difference |
15 October 1582 to 28 February 1700 |
From 5 October 1582 to 18 February 1700 |
10 days |
1 March 1700 to 28 February 1800 |
From 19 February 1700 to 17 February 1800 |
11 days |
1 March 1800 to 28 February 1900 |
From 18 February 1800 to 16 February 1900 |
12 days |
1 March 1900 to 28 February 2100 |
From 17 February 1900 to 15 February 2100 |
13 days |
Also here is a web link with to convert dates: http://www.albion.edu/english/calendar/Old_&_New_Style_Dates.html
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