It's called the Equinox, which happens biannually, one called Vernal Equinox (Spring), and one called Autumnal Equinox (Fall).
The equinox.
equinox
No. The sun is directly over the equator once near March 21 and again near September 21.
equinox
The Sun reaches an EQUINOX when it is directly above Earth's equator and the number of daylight hours equals the number of nighttime hours all over the world. At this time, neither the northern or the southern hemisphere is tilted toward the Sun.
That's the "Celestial Equator".
At the Spring and Autumn Equinox, the sun is directly over the equator which is at 0 degrees latitude.
365
Yes.
2
Equator.
Equinox