On Saturday, 3/14/15, at 9:26:53am, the clock aligned to represent the first 10 digits of pi: 3.141592653.
That won’t happen again until a hundred years from now.
Some celebrated the famous irrational number—the ratio of the circumference of a circle to its diameter—with a day’s worth of events at the Exploratorium in San Francisco (which founded the celebration of Pi Day in 1988) and others by, well, eating some pie.
Still others celebrated in conjunction with Albert Einstein’s birthday, which was also March 14.
Here’s a roundup of noteworthy Pi Day tweets:
— Science News (@ScienceNews) March 14, 2015
— Raspberry Pi (@Raspberry_Pi) March 14, 2015
You’re curious -- I can feel it. How many digits of Pi before the numerals 0123456789 appear in sequence? 17,387,594,879
— Neil deGrasse Tyson (@neiltyson) March 14, 2015
— MythBusters (@MythBusters) March 14, 2015
Have you ever wondered what pi sounds like? By matching numbers to musical notes, this musician has made math sing: http://t.co/kPMI5iSRDT
— Museum of Math (@MoMath1) March 14, 2015
And don’t feel too bad if you missed out on this year’s special festivities. As some have pointed out, next year Pi Day falls on 3/14/16—or 3.14159 rounded to the nearest ten thousandth.
Photo: Catherine Gewertz for CurvyMama Pies
A version of this news article first appeared in the Curriculum Matters blog.