The 14th of March, 3.14 in the US month/day date format, is the day to celebrate everyone's favourite constant, Pi – the irrational number defined by the circumference of a circle divided by its diameter. This year is even more special because, for a brief moment in the morning, the date and time will represent the first 10 digits of Pi: 3/14/15 9:26:53.
Pi Day has a worldwide following, marked by making (and eating) pies, reading "piems" and reciting the famous constant to as many places as possible.
To get you in the mood, our friends at the Raspberry Pi Foundation are giving 50 lucky New Scientist readers one of its new, super-fast Raspberry Pi 2 computers, complete with SD card. The programmable credit-card-sized device is the fastest selling British computer of all time, shifting over 5 million units ...
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