Multiple choice

At the equator, the sun will lie overhead on

  1. March 18 and September 20

  2. March 19 and September 21

  3. March 20 and September 22

  4. March 21 and September 23

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The sun is directly overhead at the equator during the equinoxes, when the subsolar point crosses the equator. The vernal (spring) equinox occurs around March 20-21, and the autumnal equinox occurs around September 22-23, when day and night are approximately equal.