Calendar

Calendar is a form of Technology and Culture.

Description
The movement of the moon and stars mark the passage of time. By careful study of these, a calendar may be devised to divide time into years and months, and to determine when is the correct time to plant and harvest crops. Sadly the months marked by the phases of the moon, do not divide evenly into the year, so some years will have 12 months, and some 13.

Effects

 * Increase authority by 1