Spring begins Thursday at 10:57 a.m. MDT in Denver. Here are some fun facts about the equinox.
* The equinox occurs twice per year when the sun is directly above the Earth’s equator and day and night are of equal length.
* The first day of spring is marked by the vernal equinox.
* The autumnal equinox for the first day of fall will be at 8:29 p.m. MDT on Sept. 22.
* The vernal equinox occurs in the Northern Hemisphere on March 19, 20, or 21.
* The autumnal equinox occurs in the Northern Hemisphere on Sept. 22 or 23.
* The equinox marks the two times each year when day and night are the same length in all parts of the world.
* An equinox is different from a solstice, where the sun hits its northernmost or southernmost position. Solstices mark the beginning of summer (June) and winter (December).
* The term equinox comes from the Latin word equinoxium, meaning “equality between day and night.”
* Easter falls on the first Sunday after the first full moon after the vernal equinox. This year, it’s April 20.
* The spring and fall equinoxes have played roles in a number of historical religious and cultural celebrations across the globe.
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