March 14, or 3/14, is recognized by math geeks as Pi day. That happens every year.
But as UBS's Art Cashin notes, next year's Pi day will be a once-in-a-century Pi day.
"At 9:26:53 a.m., they can write 3/14/15; 9:26:53, which you should also recall are the first ten digits of Pi in perfect order," said Cashin.
We can't wait.