When Does Spring Begin In 2025. Spring will last from march 20 until june 21, when summer officially starts in 2025. Spring begins with the vernal equinox, tuesday, march 20, 2035, 3:02 p.m.
The spring equinox 2025 is a significant astronomical event that marks the beginning of spring in the northern hemisphere and autumn in the southern hemisphere. Fall begins with the autumnal equinox, sunday, september 23, 2035, 12:39 a.m.