What Day Does Spring Begin In 2025. Leap years are caused by earth's rotation. The spring equinox (march 19, 2025) signals the start of spring in the northern hemisphere, the beginning of autumn in the southern hemisphere, and a rare.
Astronomical spring officially begins at 11:06 p.m. Spring 2025 started on wednesday, march 20, 2025 (5 days ago) and ends on thursday, june 20th 2025 (in 87 days).