Solar Eclipses - Saros cycles:

Lunar Eclipses - Saros cycles:

The periodicity and recurrence of solar and lunar eclipses is governed by the Saros cycle.Saros cycle is a period of approximately 6,585.3 days (18 years 11 days 8 hours). When two eclipses are separated by a period of one Saros, they share a very similar geometry. The two eclipses occur at the same Lunar Node with the Moon at nearly the same distance from Earth and at the same time of year.