Tomorrow: It's Not a Question of When, but Where! (family)

Schedule

Sat Nov 14 2026 at 02:30 pm to 03:45 pm

UTC+00:00
Location

The Royal Institution of Great Britain | London, EN

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Vanessa Madu explores the mathematics of time keeping across the globe
About this Event

Why does the International Date Line look like it was drawn by a toddler? On a globe, drawing a line that separates one day from the next sounds simple enough. So why does it zigzag across the Pacific Ocean in a way that looks like a mistake?
Mathematician Vanessa Madu is here to explain. Join her as she investigates the surprisingly mathematical problem of keeping track of time on a spinning sphere. Along the way, you'll discover why the Date Line exists in the first place, how centuries of history and geopolitics have bent it wildly out of shape, and the surprising mathematical consequences that mean now, for two hours a day, there are three calendar days happening all at once.
Blending mathematics, geography, history and a good amount of curiosity, this talk explores how what should be a simple straight line on a map tells a remarkable story of the unexpected things that can happen when maths meets human decision making.


This is a theatre event for children and adults to enjoy together. We recommend our family talks for children aged 7–13, though they can be enjoyed by audiences of all ages.

All young people under the age of 13 need to be accompanied by a paying adult and those aged 4 and above need a ticket to attend.

By booking to attend events at the Royal Institution, you confirm that you have read and accept the Ri's . You also agree to abide by our , and help to create a great experience for yourself and your fellow participants.

Image credit: Vanessa Madu

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Where is it happening?

The Royal Institution of Great Britain, 21 Albemarle Street, London, United Kingdom

Event Location & Nearby Stays:

Tickets

GBP 7.75 to GBP 21.20

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The Royal Institution
Host or PublisherThe Royal Institution

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