online through Google's virtual classroom project. David Blatner, author of the comprehensive book The Joy of Pi, is hosting a Pi Day competition in which students from three classrooms will square off to see who can recite the most digits of pi from memory. How did Pi Day become such a big thing ? Blatner says that Pi Day has become a hit for the same reason the new Cosmos TV show is getting so much attention. People all around the world are hungry to make science and math fun and interesting, he said in an e-mail. We know math and science is important, we know that it's fascinating, but we often do n't know how to make it fun and interesting. Pi Day gives us a great excuse to throw away our fear of math and say Hey, it IS kind of neat ! If you agree, just wait until 3/14/15 -- or as one popular Facebook group calls it, The Only Pi Day of Our Lives. That's because pi to four digits after the decimal is 3.1415, and we 're unlikely to survive until 2115 to see that second instance of pi perfection. So get ready next year to take a picture of your digital clock on 3/14/15 at 9:26:53 a.m. That 'll be worth more than a thousand digits. Follow Elizabeth Landau on Twitter at @lizlandau How do you celebrate Pi Day ? Tell us in the comments.