Ancient Time Lord system based on phases of 10 years & 9 months. It is derived by adding the minor years of the planets together (192 years) and dividing by 12. Each of the 7 planets (Time Lords) are then assigned a period, starting with Sun (diurnal birth) or Moon (nocturnal birth). Each of the 7 periods is thus 129 months. As in the Hindu dasa-bhukti system, each of the periods is divided into sub-periods, in order, ruled by the various planets.