Universal Calendar Calculator
The Universal Calendar Calculator can display and convert between 10 different calendars: Julian Day Number, Gregorian (New Style), Julian (Old Style), Roman-Julian, French Revolution, Hebrew, Islamic, Chinese, Chinese/Gregorian, and Thai Suriyakati Calendar. The Universal Calendar Calculator also contains: * Dates of holidays for the United States, Christian (Nicean Rule and Modern), Islamic, Jewish, and Chinese. * Regional date of conversion from the Old Style (Julian) to the New Style (Gregorian) for more than 100 localities. * Almost 100 Medieval European Regional Day Name Calendars. These calendars allow you to easily identify the specific Julian Calendar day of many Latin day names given in Medieval documents.