Subsolar point

The subsolar point on a planet is when its Sun looks like it is directly overhead (in zenith). For planets with a rotation like the Earth's, the subsolar point will move westward, circling the globe once a day.

Subsolar Point Media

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  The subsolar point at Honolulu during Lahaina Noon with the range of possible subsolar points shaded in pink – the angle between the Sun and the local horizontal level is exactly 90° at the subsolar point

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  On this azimuthal equidistant projection centred on Mecca, when the subsolar point is on the Ka'bah, shadows of vertical poles on the sunlit hemisphere point away from it