In my country we write our dates out as MM/DD/YYYY, which I agree is wrong and confusing, but the benefit of this is that today, March 14 (3/14), is known as Pi(e) Day.
Please enjoy this excerpt from Going Postal, a Discworld book; the Discworld inventor known as Bloody Stupid Johnson broke space-time by literally reinventing the wheel :)
Moist moved a little closer to the machine and peered into the machinery. He could just make out, at the heart of the glow, a little wheel. It was turning, slowly. [...]
"[...] never learned jommetry, sir. Bit of a hole in my understanding, all that stuff about angles and suchlike. But this, sir, is all about pie.'
'Like in food?' said Moist, drawing back from the sinister glow.
'No, no, sir. Pie like in jommetry.'
'Oh, you mean pi the number you get when ... Moist paused. He was erratically good at maths, which is to say he could calculate odds and currency very, very fast. There had been a geometry section in his book at school, but he'd never seen the point. He tried, anyway.
'It's all to do with ... it's the number you get when the radius of a circle...no, the length of the rim of a wheel is three and a bit times the er....'
'Something like that, sir, probably, something like that,' said Groat. 'Three and a bit, that's the ticket. Only Bloody Stupid Johnson said that was untidy, so he designed a wheel where the pie was exactly three. And that's it, in there.'
'But that's impossible!' said Moist. 'You can't do that! Pi is like... built in! You can't change it. You'd have to change the universe!'
'Yes, sir. They tell me that's what happened,' said Groat calmly. [...]
'He said the machine twists just a little bit of the universe so pie could be three, sir, but it plays hob with anything you put too near it. The bits that go missing get lost in the space-time- continuememememem, sir.'
GNU Terry Pratchett