The campaigning season starts early in the spring (especially in the Seven Cities) and the mustering is the day when soldiers must report to their captains, captains to their lords, and lords to their kings. It is a day of oaths, calling up of peasant levies, and launching a season of raids, war, and commerce. The holiday stretches over three days: one to travel to the festival, then a day for swearing of oaths and contracts, then a day of blessings and prayer to Mavros before the march to war. The holiday is widely celebrated in the Magdar Kingdom, Bourgund, Verrayne, and Melana, and serves as an initiation for young warriors, who fight “Mustering Bouts” against each other to crown a “Chosen of Mavros.”
The holiday’s variable date is declared by the local priest of Thor, Perun, or Mavros. Given weather and climate, the dates of the holiday depend on the condition of the roads and rivers. In the sunny south, Mustering can take place in the first week of Springmelt (or even the last week of Deep Winter). In the north, Mustering rarely takes place in Springmelt, and the holiday more often ocurs in the first or second week of Sowing.