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Celebrating our favorite pattern! | Fibonacci Day

Nov 20, 2025 | Leander Blog

November 23 is Fibonacci Day, commemorating the Italian mathematician Leonardo of Pisa and the pattern of numbers he popularized, the Fibonacci sequence.

Tau: A Better Constant Than Pi?

Jun 27, 2025 | Leander Blog

Do you know there is an alternative mathematical constant to pi that is just as (if not more) important to geometric and trigonometric calculations? Its name is tau, represented by the Greek letter τ. And today, on June 28 (6/28) — known to us as Tau Day — we recognize this constant, whose value is approximately equal to 6.28.