Transcript:

So today is 14th of March. And if you write the date like we do in the US, the month followed by the date, 3.14, it's the start of the digits of pi — so happy Pi Day.

What is interesting is that the most rational person shares his birthday with a day dedicated to an irrational number: Albert Einstein. Today is Albert Einstein's birthday, too, 14th of March.

And here is my favourite, absolute favourite cartoon on pi. Happy Pi Day.