Tuesday 20th March 2018

Equinox literally means ?equal night," since the length of day and night is nearly equal in all parts of the world during the equinoxes. The March equinox marks when the Northern Hemisphere starts to tilt toward the sun, which means longer, sunnier days.

The March equinox marks the moment the Sun crosses the celestial equator ? the imaginary line in the sky above the Earth's equator ? from south to north. This happens on March 19, 20, or 21 every year.