Spring equinox 2026: Time, meaning, and the science behind the turning of the seasons

Spring is a glorious, warm season after the harsh cold of winter—filled with light and more sun-induced vitamin D. Friday, March 20, 2026 (at exactly 10:46 a.m. ET), marks both its triumphant return in the Northern Hemisphere and the spring equinox. So, get ready for longer days, warmer weather, and flower blooms that may cause sneezing. Let’s take a deeper look at the science behind seasons and what exactly an equinox is. What causes the seasons? The tilt of the Earth’s axis as it orbits around the sun is what causes seasons. Depending on that angle, different parts of the world receive di...