As you probably have seen, tomorrow, March 14, 2015, when written using the standard US (short) notation 3/14/15, spells out the first 5 digits of Pi. As it turns out, you can go even further down the Pi “number” hole. Here are a couple of good references:

Vox has a good (layperson) explanation of Pi Day

http://www.vox.com/2015/3/13/8205807/pi-day

Jeff Rosenthal has a detailed explanation of the Pi Instant

http://probability.ca/jeff/writing/PiInstant.html

You can also find your birthday “spelled out” WITHIN the digits of Pi using this cool Wolfram site! Here is mine: