Spring Equinox Day 2025. Summer begins with the summer solstice, monday, june 21, 2027, 10:11 a.m. The first day of spring 2025 is on thursday, march 20, 2025, at 5:01 a.m.
The spring equinox, known as the vernal equinox in the northern hemisphere, is a day on which the sun sits directly over the equator, so day and night all over the world are of equal length. It is a time for balance.