Tau Day

June 28, Friday

Tau Day
© ShutterStock
Two Pi Day, also known as Tau Day, is observed on June 28 (6/28 in the month/day format). 2π, also known by the Greek letter tau, is a common multiple in mathematical formulae and approximates to 6.28. Some have argued that is the more fundamental constant and that Tau Day should be celebrated instead.
Tau Day – days left: 218. Create Countdown to Event

Tau Day in other years

Tau Day in other countries

This site uses cookies. By continuing to use this website, you agree to our policies regarding the use of cookies.