The calculator below gives number of days between two dates, taking in account the calendar system in use in a country on a given date. Simply select a country or a calendar system for the date1 and the date2 and get your results.
The calculator may produce several different results for the countries where were several calendar systems on the given date.
The calculation uses the Calendars and countries directoty, which contains time period information of Julian and Gregorian calendars and calendar eras adoption for a country. The calendar eras are listed in Calendar Era directory.