#zero shadow

FRIEND: What is Zer0 shadow day?

ME: Keep an pen / pencil / water bottle / PIPE standing erect, exactly 90° on a flat surface preferably on white paper under the Sun. Usually they will cast a shadow. On zero shadow day, they will not cast a shadow.

FRIEND: How do I observe?

ME: First of all, never observe or look at the Sun directly or indirectly in any way and to observe the zero shadow day, you have look down at shadows around you or under your feet and NOT AT SUN. IT HAPPENS FOR LESS THAN A MINUTE.

FRIEND: Okay and?

ME: You will appreciate it if you start observing may be say 5 minutes before and after its onset. You will see the shadow disappear for a moment and then reappear. It is like an eclipse. If you see before and after, you see it better, as you can compare. But eclipse takes long time to start & finish. Here it will be in seconds.

FRIEND: Thank you.

ME: Check this video on YouTube of how to observe. It is for only 40 seconds!

FRIEND: Is there any APP to find zero shadow for my location?

ME: Yes. Zero Shadow Day on Android.

FRIEND: Wow :D

ME: CAUTION - Never look or observe the sun at all even for a brief moment with unaided eyes or through dark / protection glass of any kind.

My experiments to record the ZERO SHADOW DAY in 2018 (silly mistake) & 2023 (epic fail) ←