Did you know that around March 20^th and 21^st, the sun will cross the true celestial equator, the line in the sky above the earth’s equator, from South to North?

During those days, the length of night and day across the world is nearly (but not entirely) equal, which is about 12 hours each.

This also happens in September girls, check out the video below to see how the Vernal Equinox occurs

http://scienceworld.wolfram.com/astronomy/movies/Seasons.mov