The Iron Calendar is the most widely used calendar in all of Hazeron, recognized by most modern kingdoms.
The Iron Calendar was instated by the Ereidin High Council in Atavar in an attempt to unify some of the surrounding territories, marking a great, forgotten event. The influence of the calendar spread throughout the continent, and eventually migrated across the known world. It is currently the most commonly observed calendar.
It is important to note that the Iron Calendar follows the seasonal structure of the upper hemisphere.