March Equinox 2025: Date, time and interesting facts

The arrival of the March equinox is a special moment. It signals a change in seasons across different parts of Earth. For centuries, cultures have marked this celestial event with traditions. In 2025, the event will take place on 20 March at 09:01 UTC. Regions 10 hours or more behind UTC will experience it on 19 March due to time zone differences.

Sun Crosses the Celestial Equator

The March equinox happens when the Sun crosses the equator. This movement shifts the Sun from the southern to the northern sky. It takes place on March 19, 20, or 21 each year. In New Delhi, it will occur on 20 March at 14:31 IST, according to timeanddate.com.

Earth’s axis tilt of 23.4° causes seasonal changes. The Sun's direct rays shift north and south throughout the year. The March equinox marks the Sun’s journey northward after the December solstice.

Equinox and Seasonal Changes

The equinox signals spring in the Northern Hemisphere. In the Southern Hemisphere, autumn officially begins. Astronomers use this event to mark the change of seasons. Meteorologists, however, consider March 1 the start of spring.

The second equinox of the year occurs in September. During that time, the seasons are reversed across hemispheres.

Interesting Equinox Facts

• The equinox occurs at a precise moment, not all day.
• The date of the March equinox varies between March 19 and 21.
• The last March 21 equinox happened in 2007; the next is in 2101.
• Day and night aren’t exactly equal during the equinox.
• Atmospheric refraction gives most places slightly longer daylight.
• The belief that eggs balance only on the equinox is a myth.
• Many cultures celebrate the equinox with festivals and rituals.

The March equinox is an astronomical event with cultural significance. Whether marking spring or autumn, it remains a time of change.