Solar calendar
The solar calendar is the principal Krasnarusian and Larolarian system of civil time. It divides the 360-sol year into twelve thirty-sol solths, each measured from one Overlap of the Red and Gold Suns to the next.
Structure
Each solth contains three ten-sol dekads. The ordinary work rhythm is four working sols, Midrest on Sol 5, three working sols and a two-sol Endrest. Official Krasnarusian administration numbers the periods from First Solth through Twelfth Solth, while older Mattrozhian and Larolarian folk names survive colloquially.
Astronomical cycle
Sol 1 is Overlap, Sol 16 is Veiling and Sol 30 is the eve of the next Overlap. The alignment is visible and repeatable, allowing the calendar to function without an abstract inherited month scheme.
Political use
The calendar encodes a theory of history based on rupture and return. Krasnarusian state ritual interprets each solth as a spiral from revolution through defence, repression and renewed organisation. International railways and treaties commonly print both solar and lunar dates.