Today, September 22 is autumnal Equinox day, reports NaijaAgroNet.
According experts, on Equinox day, the sun sets exactly on the West today after rising exactly from the East, meaning that there is approximately equal day and night respectively today.
They posited there is also vernal or spring equinox which occurs on March 21 with same description; based on the time when the sun crosses the plane of the earth's equator, making night and day of approximately equal length all over the earth and occurring about March 21 - vernal equinox, or spring equinox, whilst on September 22 is autumnal equinox.