Firdaria
A Persian period system: a 75-year cycle of planetary periods whose order depends on whether you were born by day or by night.
The firdaria give each of the seven planets and the two lunar nodes a period of years: the Sun 10, Venus 8, Mercury 13, the Moon 9, Saturn 11, Jupiter 12, Mars 7, the North Node 3 and the South Node 2, 75 years in all. A day birth starts with the Sun, a night birth with the Moon.
Each planetary period divides into seven equal sub-periods, starting with its own planet and continuing in the Chaldean order. The node periods have no sub-periods.
Sources disagree on where the nodes fall in a night birth: at the end of the sequence, which Aspicio uses by default, or straight after Mars, which is one switch away.