The Sun shines vertically on the Equator _____?

The Sun shines vertically on the Equator _____?

سورج عمودی طور پر خط استوا پر چمکتا ہے _____؟
Explanation

Equinox occurs when the sun is vertically above the equator.

At this time, the sun equally illuminates the Southern and Northern hemisphere.

At this time the world experiences equal day and night.

Equinox occur twice a year.

The months are March and September.