The Hill has gone crazy for pi.

As every math geek knows, March 14 – 3/14 – is “Pi Day,” a celebration of 3.14, the approximate number used to calculate the area of a circle. And just like elementary school teachers nationwide, America’s lawmakers are pausing to honor the most obsessed-over number in the history of mathematics – and grab a bite of pie.

Sen. Robert Casey, D-Penn., used the fanciful holiday to promote STEM education:

Today is National #PiDay – 3.14 – Take a moment to celebrate mathematics and encourage #STEM education – http://t.co/Qjmqgbw847

— Senator Bob Casey (@SenBobCasey) March 14, 2014

In a less predictable policy tie-in, Sen. Ted Cruz, R-Texas, compared pi with the national debt. Unfortunately for Cruz, pi is what mathematicians call an “irrational” number – the decimals continue to infinity.

#HappyPiDay Hopefully there are still fewer digits in the national debt than in Pi when the debt limit suspension ends a year from tomorrow!

— Senator Ted Cruz (@SenTedCruz) March 14, 2014

MIT grad Sen. Thomas Massie, R-Ky, who famously started a tech company from his dorm room, announced today that he chose his Cannon building office number as an ode to pi.

Happy Pi Day! And yes I chose this room number for that reason #PiDay #314 pic.twitter.com/OXStkJOzvz

— Thomas Massie (@RepThomasMassie) March 14, 2014

Of course, for some congresspeople, the holiday is simply an excuse to carbo-load.

Getting ready to celebrate pi day with some homemade pies! pic.twitter.com/0lBVc2EXw2

— Bill Foster (@RepBillFoster) March 14, 2014

Excited to celebrate pi day in the office! pic.twitter.com/G5M0JWH9Iu

— Senator Angus King (@SenAngusKing) March 14, 2014

I can have as much #Pi as I want! Or can I? Not an irrational idea at all. #MathChallenged #PiDay2014! pic.twitter.com/L1UhBwzwqu

— Ileana Ros-Lehtinen (@RosLehtinen) March 14, 2014

The history of Pi isn’t without its political tie-ins.

In 1897, the Indiana General Assembly almost passed a bill that would have effectively changed the value of pi to 3.2. Luckily, a Purdue mathematician intervened and pi emerged unscathed.

And filibustering pols could take a lesson from China’s Chao Lu, the Guinness world record holder for pi recitation. Lu reportedly spent 24 hours and 4 minutes reciting – from memory – the first 67,890 digits of pi – without a single bathroom break. That’s just 14 minutes shy of the longest congressional filibuster on record.

Even Healthcare.gov joined in the Pi Day fun with a tie-in of its own:

Happy Pi Day! Using the first 3 numbers of Pi gives you http://t.co/eTfU7hBJUR's deadline to enroll… 3.14 –> 3.31.14 #GetCovered

— HealthCare.gov (@HealthCareGov) March 14, 2014