The calendar of Etrium has four seasons, twelve months, and 360 days in a year. Each month consists of 30 days, and each week is 7 days long.
The twelve months are Genus, Abrus, Esrus, Laethus, Vitus, Osdus, Rulnus, Tohus, Mortus, Gotus, Vius, Yrelus.
Spring starts in Genus and runs through until the end of Esrus. Summer starts in Laethus and runs through until the end of Osdus. Autumn starts in Rulnus and runs through to the end of Mortus. Winter starts in Gotus and runs through until the end of Yrelus.
The days of the week are Luxil, Ignil, Auril, Materil, Terril, Aquil, Tenebril, with the first and last day of each week considered to be days of rest.
The year at the start of the campaign is 3916 UM.