SARFFday is shortened from "it'S All Right For Fighting Day." Moonday is the start of the week and each new month. Debate rages in scholarly arenas over which moon is honored by Moonday, since at last count Vanth had 76 moons and planetoids in orbit, to say nothing of the asteroids, half-built destruct-orbs, cloud cities and floating citadels that crowd the night sky. Thus the isolation of Vanth since the failure of the galactic nav-beam: without assistance only the most agile of pilots dare try to navigate through the maze. Most who have risked it have wrecked, the drifting hulks of their ships becoming part of the orbital debris.