 The passings of Alpher from east to west across the sky are the primary units of time, but longer periods are marked by the seasonal shift of Alpher north and south, and the overtaking of one god by another, and sand glasses are used for shorter periods.With two important suns in the sky, the ability to predict their movements would be very valuable to predict conditions over future growing seasons.Alas, while the priests can make useful short-term predictions, over the long term the gods seem to go where they will.