Members of Indigenous communities take part in a ritual in front of the Pyramid of the Sun while celebrating the spring equinox at the Teotihuacan archaeological complex. DHS Sec. Kristi Noem ...

The Northern Hemisphere’s spring — or vernal — equinox can land between March 19 and 21, depending on the year. Its fall – or autumnal — equinox can land between Sept. 21 and 24.

On the vernal equinox in March and the autumnal equinox in September, the equator (0 degrees latitude) is aligned directly with the Sun. Therefore, everywhere on Earth experiences an equal 12 ...