For the second time in 2025, an incredible astronomical event is about to change the seasons on Earth. The September equinox is almost upon us, with autumn about to begin in the Northern Hemisphere, ...

Twice a year, Earth tilts just right, giving nearly equal amounts of day and night across the globe. One of those moments arrives Monday: the fall equinox, officially ushering in the arrival of autumn ...

Meteorological spring began on March 1, while astronomical spring starts on the vernal equinox. The vernal equinox marks the astronomical first day of spring and falls on Thursday, March 20, 2025.

Meteorological spring starts on March 1 every year, while astronomical spring begins on the spring equinox, typically around March 20. The vernal equinox marks the first day of astronomical spring and ...