Spring equinox 2025: When will the new season begin; how will it affect daylight and weather

The first day of spring in the Northern Hemisphere falls on March 20, 2025, marking the vernal equinox. The event occurs when the sun is directly above the Earth's equator, resulting in nearly equal daylight and nighttime hours. The equinox also influences seasonal changes, daylight duration, and even the visibility of the Northern Lights.