FILE – Visitors hold their hands out to receive the sun’s energy as they celebrate the Spring equinox atop the Pyramid of the Sun in Teotihuacan, Mexico, Thursday, March 21, 2019.

FILE – Visitors hold their hands out to receive the sun’s energy as they celebrate the Spring equinox atop the Pyramid of the Sun in Teotihuacan, Mexico, Thursday, March 21, 2019.

FILE – Visitors hold their hands out to receive the sun’s energy as they celebrate the Spring equinox atop the Pyramid of the Sun in Teotihuacan, Mexico, Thursday, March 21, 2019.

FILE – Visitors hold their hands out to receive the sun’s energy as they celebrate the Spring equinox atop the Pyramid of the Sun in Teotihuacan, Mexico, Thursday, March 21, 2019.

FILE – Visitors hold their hands out to receive the sun’s energy as they celebrate the Spring equinox atop the Pyramid of the Sun in Teotihuacan, Mexico, Thursday, March 21, 2019.

People surround the Kukulcan Pyramid at the Mayan archaeological site of Chichén Itzá in Yucatan State, Mexico, during the celebration of the spring equinox in 2023. - Hugo Borges/AFP/Getty Images ...

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.

FILE – Visitors hold their hands out to receive the sun’s energy as they celebrate the Spring equinox atop the Pyramid of the Sun in Teotihuacan, Mexico, Thursday, March 21, 2019.

FILE – Visitors hold their hands out to receive the sun’s energy as they celebrate the Spring equinox atop the Pyramid of the Sun in Teotihuacan, Mexico, Thursday, March 21, 2019.

FILE – Visitors hold their hands out to receive the sun’s energy as they celebrate the Spring equinox atop the Pyramid of the Sun in Teotihuacan, Mexico, Thursday, March 21, 2019.