The noon sun is directly overhead at the equator during:

the non sun is directly overhead the equator on March 20 and during autumn. it is usually around september 22nd area

The Sun is directly overhead at "high-noon" on the equator twice per year, at the two equinoxes. Spring (or Vernal) Equinox is usually March 20, and Fall (or Autumnal) equinox is usually September 22. Except at the equator, the equinoxes are the only dates with equal daylight and dark.

Explanation:

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