The spring equinox marks the first day of spring today, but daylight actually lasts several minutes longer than night. Here's why the equinox doesn't appear perfectly equal.

A not-so-equal equinox: Why day beats night on the 1st day of spring

Source: space
Source Link: https://www.space.com/stargazing/a-not-so-equal-equinox-why-day-beats-night-on-the-1st-day-of-spring