What is an enquinox?

Answer 1

An equinox is the moment when the Sun is directly over the Earth's equator, and the apparent position of the Sun at that moment.

Daylight savings follows the equinox.

Answer 2

An equinox is an astronomical event that happens twice a year when the sun crosses the celestial equator. It marks the moment when the length of day and night are approximately equal all over the world. The equinoxes occur around March 20th and September 22nd each year.