Alluvian Calendar System

The Alluvian Calendar System is a lunar calendar system used by the Alluvian Empire. In this calendar system, a new Alluvian Year (more commonly known as a Lunation) starts on the day of the full moon. Other names for an Alluvian Year, or a Lunation include a Moon, a Month, or a Pencil Year. As such, each Alluvian Year lasts 29 or 30 days.

The Revolution occurred on the full moon of April 22nd, 2016 in the Gregorian Calendar. This day became the first day of the first lunation since revolution, or 1/1 ASC. Each full moon since then became the dates 1/2 ASC, 1/3 ASC, 1/4 ASC, etc. The month leading up to revolution day is known as "Year 0" or "The Celestial Terminary," and dates in this month are usually written with 0 as the year, e.g. 20/0. Months before the Celestial Terminary continue count backwards, and use "BSC" instead, e.g. 5/1 BSC = 5th day of the month before Celestial Terminary.

History
The system was proposed, and implemented during the Celestial Terminary, as part of the plans for achieving a better organised empire, after the Revolution.