In 2025, the spring equinox, marking the official start of spring in the Northern Hemisphere, occurs on Thursday, March 20, at 5:01 a.m. EDT (2:01 a.m. PDT).
This event signifies when the Sun crosses the celestial equator, moving from south to north, resulting in nearly equal day and night lengths.
Following the equinox, days continue to lengthen, leading up to the summer solstice in June.
In India, the equinox occurs at 2:31 p.m. IST on March 20, 2025. Traditionally, the first day of spring is celebrated on March 21, but due to Earth’s orbit, the equinox—and thus the start of spring—can fall on March 19, 20, or 21 each year.