Overview
- - Google marked March 14 with a global interactive Doodle that explains Archimedes’ polygon method for approximating π and visualizes its use in circle formulas.
- - Experts highlighted π’s ubiquity in practice, from spacecraft navigation and signal design to droplet formation, microfluidics and rapid diagnostics in bioengineering.
- - U.S. chains rolled out limited‑time promotions keyed to 3.14, including $3.14 pizzas at 7‑Eleven/Speedway, Pizza Hut BOGO deals via DoorDash, Blaze Pizza offers, Burger King dessert pies with a $3.14 purchase, and $3.14‑priced add‑ons at Marco’s and Round Table.
- - Most promotions required app use, loyalty enrollment or a qualifying purchase, and availability varied by participating locations and time windows.
- - March 14’s observance traces to the Exploratorium’s 1988 event by Larry Shaw and a 2009 U.S. House resolution, with media coverage pairing education about π’s properties with retail tie‑ins.