The Voice of Vexillology, Flags & Heraldry
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Tuesday, March 5, 2019
Heptadecial Pi Day - March 5th
A π-day flag based upon the seven digit numerical system. It is dedicated to Geradus Mercator, who was born on March, 7 1512.
The flag combines the maritime flags for 3, 0, and 5.
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