Calendar system

The GSC is what happens when a bunch of people who take pride in their stone-age ancestors get together and try to make a calendar by committee.” -Jason Hancock, scientist


The Gaian Standard Calendar (GSC) is divided into Cycles, Phases, Periods, and Days. One cycle is ten phases long, one phase is eight periods long, and one period is 36 days.

Base of the system

The GSC’s cycles are based upon stellar patterns. It is derived from the time in phases it takes for the star Chronus to fluctuate through its entire brightness cycle, from apparent magnitude of -8.1 (of comparable brightness to the twins at half/quarter phase) to apparent magnitude -1.6, as bright as the brightest stars in the sky. There is an overarching system of cycles which can determine events of farther reaching time, including a 10 cycle nomination called a collective and a 100 cycle nomination called an epoch. These are based upon the arrival of objects such as comets, which allow timekeepers to assign a cycle of names to each epoch and collective.

The GSC’s Phases are based upon the lunar cycle of the twins. One phase is the number of periods it takes for both twins to execute all variations of their lunar cycle (these may be deemed in the manner of half-quarter, full-new, etc.), starting and ending with the first waxing new-new moons after all variations have been completed. This process is surprisingly regular,

The GSC’s periods are based upon the length of time between the full moons of Castor. One period is the time from Castor in full to another Castor in full.

Within the standard framework, periods are also broken down into six day weeks.

Notation in writing

In writing, the GSC is notated thus:


in long-term writing or in phase length notation, it is shortened to:


For shorter term paperwork, cycle and phase are normally pre-noted or pre-printed, allowing the writer to use only Period/day in their notation.

Calendar system

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