## June 28 – Celebrate Tau Day!

As you know, many people celebrate PI Day by having Pi pie. (See my post on Pi Day, here.) But there is a rival movement afoot to replace Pi Day with Tau Day (and indeed, to replace Pi with Tau as a standard).

Pi, of course, is the ratio of a circle’s circumference to its diameter (3.14159265…), currently celebrated on March 14. Tau, or τ, is the ratio of a circle’s circumference to its radius. Thus it is twice the amount of π (6.28318530…). (Hence the celebration on June 28.)

Mathematicians are divided on the issue, but to me it makes infinite [sic] sense to celebrate Tau Day, because it implies TWO pieces of pie. TWO pies. This sounds like a good thing.

Another way to look at Pi Day

### Two Times PI:

Two of the 2012 winners from the yearly Pi Day contest sponsored by the Serious Eats Blog:

### Happy 6.28318530717958647692… Day!

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### 10 Responses to June 28 – Celebrate Tau Day!

1. Sandy says:

Twice pie (pi) sounds like a great idea! Except that it might give me twice the chin or twice the belly roll…

2. Beth F says:

3. I like Pi Day better…because of the pie. This seems like one of those fake holidays..not like Pi Day!

4. BermudaOnion says:

Too bad I don’t like pie.

5. Charlie says:

Love it, though I couldn’t imagine pi not being around in future!

6. Stefanie says:

Happy Tau day! Two pieces of pie are better than one. But I will always be partial to pi because it has the cooler symbol 🙂

7. Word. Hell with you, pi! We’re moving on to new things!

(I have no dog in this fight really. But I like REBELLION.)

8. Rita K says:

I love pie, but this will give me an excuse to make two.

9. bookingmama says:

I agree that if I can eat double the pie, then it’s a celebration!

10. You always post such fun and informative pieces!!

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