2 McLean Businesses Celebrate Pi Day With Special Deals
By Michael O'Connell
Published on March 13, 2026.
The first Pi Day was held in 1988 by Larry Shaw at the Exploratorium in San Francisco to celebrate the mathematical symbol π, which is used to calculate the area, volume, and circumference of a circle. The event will also feature free pizza, prizes, and activities from the Mathnasium of McLean.
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