Imagine stepping outside in broad daylight and looking down—only to realise your shadow has disappeared.

No clouds. No eclipse. No trick photography. For nearly two minutes this Saturday, people across Hyderabad will witness one of nature’s most fascinating astronomical events: Zero Shadow Day.

At exactly 12:12 PM, the Sun will align perfectly overhead at a 90-degree angle. During this precise moment, vertical objects such as poles, bottles, or even standing people will cast almost no shadow at all.

It may sound like something from a science-fiction film, but it is actually a beautifully predictable event caused by the movement of Earth around the Sun.

Why Does The Shadow Disappear?

The phenomenon happens because Earth is tilted at about 23.5 degrees on its axis.

As the planet revolves around the Sun, sunlight strikes different regions at varying angles throughout the year. On specific days, for places located between the Tropic of Cancer and the Tropic of Capricorn, the Sun reaches its highest possible point in the sky — directly overhead.

This position is known as the zenith.

When that happens, sunlight falls vertically instead of at an angle, causing shadows to shrink dramatically or disappear completely for a brief period.

For Hyderabad, that moment arrives on May 9 at 12:12 PM.

The event occurs twice every year for cities located within the tropical zone, but each city gets its own unique dates depending on its latitude.

Where Can You Watch It?

The GP Birla Archaeological Astronomical and Scientific Research Institute in Hydearbad is organising a public observation event at the B M Birla Science Centre from 11:30 AM to 12:30 PM.

The event will include guided solar observation sessions, science demonstrations, and interactive activities designed especially for students and curious visitors.

Best of all, the event is completely free and open to the public. Organisers are encouraging people to bring simple objects like rulers, bottles, or cylindrical containers to observe the phenomenon firsthand.

You Don’t Need Any Special Equipment

Unlike eclipses or meteor showers, Zero Shadow Day requires no telescope or expensive gear.

All you need is sunlight and a vertical object.

Place any upright object on flat ground exactly at 12:12 PM and watch closely. Its shadow will shrink to nearly nothing before slowly returning again as the Sun moves away from the zenith.

For many people, it becomes a strangely surreal experience — a reminder of how precisely our planet moves through space every second.

Other Indian Cities Are Next

Hyderabad is part of a fascinating seasonal wave of Zero Shadow Days moving northward across India.

Bengaluru witnessed the event on April 24. Pune will experience it on May 13, while Mumbai will witness it on May 15 and again on June 27.

Bhopal is scheduled to observe the phenomenon on June 13 and June 28.

Each city experiences the event at slightly different times because of the Sun’s changing position relative to Earth during summer.

More Than Just A Science Event

Zero Shadow Day is more than a scientific curiosity. It is a rare opportunity to physically witness Earth’s geometry in action.

In a world dominated by screens and digital experiences, this phenomenon invites people to simply step outside, look at the ground, and connect with the universe above them.

For two brief minutes on May 9, Hyderabad will experience a moment where shadows vanish and science becomes visible to the naked eye.

And sometimes, the universe does not need fireworks to amaze us — just sunlight at the perfect angle!