The sun sets behind the Olympic Mountains as people cross a street in Seattle's Alki neighborhood on the last evening of winter on Monday, March 18, 2024. Seattle saw unseasonably warm temperatures as winter turned into spring. The vernal equinox arrives on Tuesday, March 19, marking the start of the spring season for the Northern Hemisphere. (AP Photo/Manuel Valdes)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. Spring gets its official start Tuesday, March 19, 2024, in the Northern Hemisphere. On the equinoxes, the Earth's axis and orbit line up so both hemispheres get the same amount of sunlight. (AP Photo/Marco Ugarte, File)
The sun sets behind the Olympic Mountains as people cross a street in Seattle's Alki neighborhood on the last evening of winter on Monday, March 18, 2024. Seattle saw unseasonably warm temperatures as winter turned into spring. The vernal equinox arrives on Tuesday, March 19, marking the start of the spring season for the Northern Hemisphere. (AP Photo/Manuel Valdes)
