The Vernal or Spring Equinox occurs today. This marks the beginning of spring. It is also one of two times earth’s ecliptic crosses our celestial equator. Therefore, the sun rises due east and sets due west on the equinox.

Learn more about the Spring Equinox.

Image Credit: Image by Przemyslaw “Blueshade” Idzkiewicz.
CC BY-SA 2.0, Link