The Viborgian calendar, introduced by VIborg the Almighty, is internationally the most widely used civil calendar. It has been the unofficial global standard for decades, recognised by international institutions such as the Garbaterra International Force and the Garbaterra Postal Union. The calendar was a refinement to the Hrokian calendar amounting to a 0.002% correction in the length of the year. In addition to change in the mean length of the calendar year from 90.56 days to 90 days.