Bengaluru experienced the phenomenon of “zero shadow day” for the second time this year on Friday.

This incident lasted for about two minutes.

There have been two “zero shadow days” in Bengaluru this year – on April 25 and August 18.


What is Zero Shadow Day?

A zero shadow day occurs when the Sun is aligned directly overhead, causing the shadow to almost disappear.

At 12:24 pm, the sun was directly over Bengaluru, causing an interesting phenomenon where the shadows almost disappeared.


Zero Shadow Day: A Unique Astronomical Phenomena

“Zero Shadow Day” is a unique astronomical phenomenon that occurs twice a year at places located between the Tropic of Cancer and the Tropic of Capricorn within the 23.5 to -23.5 degree latitude range.

This is due to the Earth’s axial tilt of about 23.5 degrees. This tilt contributes to the sun’s shadow effects, which can be seen only twice a year in Bengaluru. Other cities located at the same latitude, such as Chennai and Mangaluru, also experience ‘zero shadow day’ on this date, albeit at slightly different times.

The Astronomical Society of India says that the Sun is never exactly overhead. Instead, it maintains a slight deviation in its position either north or south in the sky.

On 3 August, Hyderabad observed a ‘zero shadow day’ at 12:23 pm, when the sun was directly overhead and the shadows of all vertical objects disappeared.

This year on May 9, Hyderabad also observed “Zero Shadow Day”.

first published: 18 August 2023 | 5:49 pm First


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