Outwork
Outwork is an intercalary period at the very end of the Fortressian calendar, after the month of Lunidor and before the month of Portcullose and the new year. Any and all additional days necessary to keep the Fortressian calendar synced to the Earth's 365 day year are placed in Outwork. In practice, this means that Outwork always has at minimum fifteen days, while in Gregorian calendar years with leap days, the number of days is sixteen instead.
Etymology
Outwork is named after outworks, the a fortress's defensive structures that are physically detached from the main structure.
Notable Events
12 Outwork 5 - COVID-19 is declared to be endemic.
14 Outwork 5 - The first issue of The Fortressian Letter is published.
17 Outwork 7 - Due to an incorrect calculation of dates between the Fortressian and Gregorian calendars, there are seventeen days in Outwork 7, one more than there are on leap years.