First Day Of Spring 2025 Usa Dates. 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. There are four seasons in a year:
Need to know the exact date of of the first day of spring this year? 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.
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