So an eclipse cycle is any period P for which approximately holds:

Each of these is an eclipse cycle.

The synodic month is used to calculate eclipse cycles.

The saros is probably the best known and one of the most accurate eclipse cycles.

The inex is an eclipse cycle of 10,571.95 days (about 29 years minus 20 days).

Some Greek astronomers worked out calendars based on the eclipse cycle.

An eclipse cycle takes place when a series of eclipses are separated by a certain interval of time.

There can be from four to seven eclipses in a calendar year, which repeat according to various eclipse cycles, such as a saros.

The tritos is an eclipse cycle of 3986.63 days.

Lunar eclipses are related by many different eclipse cycles.