Pi Day is an annual celebration of the mathematical constant π (pi) with events mostly in the United States. Pi Day is observed on March 14 since 3, 1, and 4 are the first three significant figures of π and was founded in 1988 by Larry Shaw, an employee of the Exploratorium, a science museum in San Francisco.
Tau Day
On June 28, in the year 0, Tau Day. This event is recorded as a Holidays event in the history of June 28, a notable event in this corner of history.
Key Facts
- This event took place on June 28, 0 (AD era).
- It is categorised as a Holidays event in recorded history.
- Referenced in 1 Wikipedia article.
- Wikipedia source last updated on 7 April 2026.
On This Date in History
This article draws on content from Wikipedia, available under CC BY-SA 4.0.
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