For use with Fictional Calender Systems. Calendars can count forward (e.g. each successive date is a greater number than the previous date, which is by far the most common) or backward (e.g. in which each successive date is a lower number than the previous date, similar to the way BCE dates are counted in the Gregorian calendar). [ - ]

For use with Fictional Calender Systems. Calendars can count forward (e.g. each successive date... [ + ]