The Day Your Shadow Vanishes: India's Zero Shadow Day

For a few minutes at solar noon, vertical objects in much of India cast no shadow at all.

It happens twice a year, only in places between the Tropic of Cancer and the equator.

Bengaluru and Chennai see it around April 24-25 and August 18; Hyderabad May 9 and August 5.

The exact date depends on your latitude — the Sun must sit directly overhead.

You can prove the Earth's tilt yourself with a stick, a phone and ten minutes.

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