From Timeanddate.com
March Equinox – Equal Day and Night, Nearly
There are two equinoxes every year – in March and September – when the Sun shines directly on the equator and the length of night and day are nearly equal.

The Earth during the equinox. (Not to scale)
March Equinox in Salt Lake City, Utah, USA is on
Tuesday, March 20, 2018 at 10:15 am MDT (Change city)
- Sunrise, sunset and day length around March Equinox 2018
- Countdown to March Equinox 2018 in Salt Lake City, Utah, USA
March Equinox in Universal Coordinated Time is on
Tuesday, March 20, 2018 at 16:15 UTC