Since the launch of The Tau Manifesto on the first Tau Day (June 28, 2010), the number tau = 6.283185… has become an international phenomenon:

• MIT now announces its annual admissions on Pi Day at Tau Time.
• Tau has been programmed into the Google Calculator: since tau is 2 pi, tau/2 should be 3.14159…—and it is!
• The Khan Academy accepts tau when answering math questions.
• Tau has made appearances in two iconic geek comic strips: xkcd and SMBC.
• There's even a tau-themed beer called Key Lime Tau. Its alcohol percentage is—you guessed it—6.28!

In honor of Tau Day 2017, please join me and other enthusiastic tauists for a celebration of the true circle constant—a event which, as usual, calls for eating twice as much pi(e)!