I have never seen anyone mention a moon period. Though I believe I have seen heraldry that displays multiple moons. Might not mean much, but I was wondering what was established.
While I completely understand leaving regional names up to players, as well as the names of celestial bodies, facts such as how many moons we have and hell, even the color of the sun, should be firmly established. Such things are NOT open to cultural or individual interpretation.
And Chenier, the name of the sun isn't bad, but I agree with the name Battlemasterra. Masterra alone wouldn't be -too- bad alone though.