Tomorrow is March 14 (3.14), so its known as Pi day, to honour the all-important constant.
Incidentally, the Bible has been criticized by mathematicians because the scriptures give a very poor value of Pi.
The scripture is based on 1Kings 7: 23 and reads as follows:
"and he proceeded to make the molten sea ten cubits from its one brim to its other brim, circular all around; and its height was five cubits, and it took a line of thirty cubits to circle all around it"
Now that shape is actually mathematically impossible to construct, because if the diameter is 10 cubits, the circumference would have to be 31.4159 cubits. (circumference = pi x diameter)
Other nations did come up with fairly close approximations of the value of pi, but it was Archimedes who really nailed it in the 3rd century bc.
Just another item in the Bible that doesn't add up I guess.
Anyway, its a fascinating constant, and I hope you enjoy "Pi day tomorrow"!