An equinox is a phenomenon that only happens twice a year – once during the spring equinox and once during the autumn equinox ...

the spring equinox happens around March 20, marking the end of winter and the beginning of spring. The autumn equinox occurs around September 23 in the northern hemisphere and marks the beginning ...

On Monday, March 20, 2023, our planet—spinning ... It’s an occasion—along with September’s equinox and the solstices in June and December—that’s been marked by humans for thousands ...