Lecture, Barnard's Inn Hall, Wednesday, 16 Dec 2026 - 18:00

The Maths of Christmas

An older man dressed as Santa Claus looking thoughtfully upward while holding a large burlap sack filled with wrapped gifts. He wears a classic red and white suit, a matching hat, white gloves, and has a full white beard

This lecture opens a mathematical cabinet of Christmas curiosities to reveal the maths hidden inside our favourite festive traditions.

We look at the strange geometry of holly leaves, solve the challenge of creating the pristine six-fold symmetry of a snowflake within the rules of origami (no scissors allowed), and discover algorithms to optimise everything on the festive table from the roast potatoes to the post lunch mince pie (mince π?). All you need for a merry mathematical Christmas is here!

Sarah Hart Professor of Geometry

Professor Sarah Hart

Professor of Geometry

Sarah Hart was the first woman Professor of Geometry at Gresham College, and Acting Provost between March and October 2025. She is also Professor Emerita of Mathematics at Birkbeck, University of London where she served as the Head of Mathematics and Statistics.

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