Question

Why are days and nights are equal on 21 of March and 23 of September all over world​

Answer 1

The event known as equinox is eagerly awaited by space enthusiasts as it takes place twice a year on March 21 and September 23. On the equinox day, the sun moves across the celestial equator which lies directly above the earth's equator. ... It means equal day and night.

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