For my job, I have to sign my name as approval in order for invoices to be processed/paid. So that I can follow a procedure that I assume is GMP (Good Manufacturing Practice), I write "ok to pay", sign my name, and indicate the date. Today, I signed off on a million invoices, so I was getting a little (very) sloppy, and when I wrote "11/17/08", the "17" was smooshed and looked like the sign for pi.
Q: What day is it?
A: November pi, 2008.