Days Until Spring Equinox (Northern Hemisphere, approx.)
Days until Spring Equinox (Northern Hemisphere, approx.)
Exact date varies by 1 day year to year; March 20 used as the common approximation.
About Spring Equinox (Northern Hemisphere, approx.)
The Northern Hemisphere's spring (vernal) equinox, occurring around March 19-21 depending on the year, is one of two points in the year when Earth's axial tilt results in roughly equal day and night length worldwide.
The exact date shifts slightly year to year for the same orbital-timing reason as the solstices; this page uses March 20 as a common reference approximation.
The equinox's roughly equal day and night length is only approximate, not exact, because of how atmospheric refraction and the sun's apparent disc size slightly extend perceived daylight beyond a true geometric halfway point.
Iran's Nowruz new year celebration is directly tied to the spring equinox rather than a fixed calendar date, making it one of relatively few major new year observances anchored to an astronomical event rather than a fixed day.
Related countdowns
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