When Is The 1st Day Of Spring 2025 In America. In the northern hemisphere, the astronomical start of spring, also known as the spring equinox, will occur on thursday, march 20, at 5:01 am edt in 2025. 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.
The first day of spring is in 2025 on march 20 (according to the astronomical definition). Online calendar of holidays and days off in united states for the spring of 2025.
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