Crops' calendar

The Crops' calendar is a calendar system used by the Kalikhan Academy of Sciences.

The calendar follows the Carrot Era — abbreviated AC, for the Latin anno carroti, meaning "in the year of the carrot". It numbers the years since the appearance of the wild carrot as a widely grown agricultural product, starting with 1 AC. The calendar was introduced in September 49, 3 AC, but was not taken into usage until early 4 AC.

The reason behind its implementation was to create a standardized calendar for academic work, most notably the documentation of historic events.