The Spring Equinox is the first day of the spring season, this year it will happen on March 20th.

The Spring Equinox happens when the sun passes the equator moving from the southern to the northern hemisphere.

The meaning of the word Equinox is from the Latin word for equal. The day and the night will now be relatively equal. 

The Spring Equinox will always occur either on the 20th or 21st March. 

It can be called the Vernal Equinox, Vernal is Latin means Spring.