The Common Calendar

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The Common Calendar is abbreviated CC. It is used by most nations in Bandagora, and was the only lasting consequence of the Treaty Great Treaty, which was drafted i -8 CC. Before that, most nations designated a year by it being the first year under a given sovereign's rule, the next year the second under said person's rule and so forth. 
Since it was designed by scholars of Balvine, it starts in the year 0 CC and follows the seasons quite accurately.
Note that cc means copper coin(s).