First day of spring

Astronomically speaking, the spring equinox falls on March 19 or March 20, 2016. Here are all the Equinox times for North American time zones this year:

• Saturday, March 19, 2016 at 9:30 PM PDT
• Saturday, March 19, 2016 at 10:30 PM MDT
• Saturday, March 19, 2016 at 11:30 PM CDT
• Sunday, March 20, 2016 at 12:30 AM EDT

This equinox, also known as the vernal equinox, occurs when the Sun crosses the celestial equator on its way north along the ecliptic.