Proudly hacked by
magnus bodin
*) Note that the date-calculations here is only valid for dates in the Gregorian calendar.
This was implemented at different points in time in different countries;
1582: Spain, Portugal, Italy and the Catholic states of Germany
1700: Protestant parts of Germany
1812: Switzerland (actually during 1583-1812)
1752: Great Britain and her colonies (including the United States)
1753: Sweden
1918: Russia
1927: Turkey