testing the randomness of (new Date % n)

dateRand.js

#!/usr/local/bin/node

var i = 1000
  , ret = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

!function calc() {
  var rand = new Date % ret.length

  return i--
    ? setTimeout(calc, rand+20) && ret[rand]++
    : console.log(ret)
}()

output.txt

[ 109,
  16,
  18,
  1,
  154,
  20,
  41,
  0,
  155,
  29,
  20,
  0,
  155,
  40,
  29,
  0,
  155,
  29,
  29,
  0 ]