Spring Equinox 2024 In Usa. The vernal equinox 2024 brings spring to the northern hemisphere today, marking a celestial occurrence that has been celebrated across cultures for millennia. When do the four seasons start in 2024—for spring, summer, fall, and winter?

In the northern hemisphere, the astronomical start of spring is also known as the spring equinox. The spring equinox (march 19, 2024) signals the start of spring in the northern hemisphere, the beginning of autumn in the southern hemisphere, and a rare moment.