Meteorologically speaking, the official first day of spring is March 1 (and the last is May 31). Weather scientists divide the year into quarters to make it easier to compare seasonal and monthly statistics …

Mar 20, 2026 · Traditionally, we celebrate the first day of spring on March 21, but astronomers and calendar manufacturers alike now say that the spring season starts on March 20 in all time zones in …

The first day of spring (March equinox or vernal equinox) is when the sun shines directly on the celestial equator passing from south to north and the length of day and night are almost the same. This is …

Mar 19, 2026 · Spring officially begins on Friday, March 20, at 10:46 a.m. ET, according to the U.S. Naval Observatory. It marks the spring equinox, or the astronomical start to spring.

Astronomical spring begins on the day of the equinox. The name of the event derives from Latin and means equal night, giving the impression that both day and night are exactly 12 hours long.

Spring Spring starts on March 20 or 21 and lasts until June 20 or 21. The first day of spring occurs on the spring equinox, which marks the astronomical beginning of spring. Meteorologically, spring …

Mar 20, 2026 · Spring officially begins at 10:46 a.m. ET on Friday, March 20, 2026, with the arrival of the vernal equinox (spring equinox). The equinox marks the moment the sun shines directly over Earth's...