A hot air ball balloon floats past while people stand in line to climb the Pyramid of the Sun and welcome the spring equinox in the pre-hispanic city of Teotihuacan, on the outskirts of Mexico City, Mexico, March 20, 2016. Spring equinox in Teotihuacán is an annual event which takes place around the 20th and 21st of March at the pre-Hispanic site of Teotihuacán, Mexico. This event is mirrored by other similar events in other pre-Hispanic sites such as Chichén Itzá and Malinalco, Mexico State. (Photo by Edgard Garrido/Reuters)

A performer plays the role of the Emperor during a re-enactment of an ancient ceremony of Qing Dynasty Emperors praying at Ritan Park which holds the ceremony of 'fete day'' to mark the first day of spring on March 21st, 2011 in Beijing, China. March 21st is the Day of Vernal Equinox according to the Chinese lunar calender. (Photo by Lintao Zhang/Getty Images)

Bikini-clad women ski as they are led by a car during a performance on the frozen Yenisei River outside Krasnoyarsk, Siberia, Russia, March 20, 2016. The performance, entitled “Siberian Spring's Strings” and created with the participation of artist Vasily Slonov, marked the day of spring equinox (vernal equinox), according to organizers. (Photo by Ilya Naymushin/Reuters)

Australian model Shanina Shaik attends the Interview x Equinox party during NYFW on February 7, 2024. (Photo by Rupert Ramsay/BFA.com)

A day-old lamb exploring new surroundings on the vernal equinox, considered the first day of spring, on March 20, 2019 at Coombes Farm in Lancing, England. (Photo by Andrew Hasson/Getty Images)

Today is what is known as the equilux and it happens when day and night are equal and occurs a few days before the spring equinox, and a few days after the autumn equinox. What appears to be a floating leaf is actually a stray sticking to a wet car windshield in a park in Scaggsville, Maryland on September 25, 2024. Today sunrise was at 7:02am and sunset took place at 7:02pm. The green and orange colored leaf (about half for each color) seems to represent the transition from Summer to Fall. (Photo by Michael S. Williamson/The Washington Post)

People exercise in Primrose Hill in London, Britain, 20 March 2025. The first day of spring in the UK astronomically occurs on the vernal equinox where earth's axis is not tilted towards or away from the sun, resulting in an equal amount of day and night on all latitudes. (Photo by Neil Hall/EPA/EFE)

An indigenous woman kicks the ball during a Mayan ball game match in Tecpan, Guatemala on March 23, 2024. Dressed in shorts, girdle and uncovered torso, members of eleven teams from the Guatemalan indigenous departments of Chimaltenango, Quiche, Solola and Quetzaltenango, as well as one from El Salvador, commemorated the March equinox with a tournament of the ancestral Mayan ball game on Saturday. (Photo by Photo by Johan Ordonez/AFP Photo)