The great cycle of the sun is 28 years, and therein are seven small cycles each of four years. The number of days of the solar year is 365 and a quarter of a day. The seasons of the solar year are four, each season (consisting of) 91 days 7½ hours. The beginnings of the cycles of the seasons are the 4th, 2nd, 7th, 5th, 3rd, 1st, and 6th (days). Between each cycle there are 5 days and 6 (hours).
The Teḳuphoth (i.e. seasons) of the small cycle are four in each year, some of them (last) 91 days 7½ hours and some last 92 days. The first year of the cycle (of four years) has its Teḳuphah in Nisan at 6 p.m.; in the second year at 12 p.m.; in the third year at 6 a.m.; in the fourth year at 12 a.m.