text: require('proof')(3, prove)
  
  function prove (assert) {
      var tz = require('timezone'), util = require('../util')
      assert(tz(util.y2k, '%N'), '000000000', 'top of hour')
      assert(tz(util.utc(1980, 0, 1, 0, 0, 1, 999), '%N'), '999000000', 'last millisecond')
      assert(tz(util.utc(1980, 0, 1, 0, 0, 1, 3), '%N'), '003000000', 'nanoseconds')
  }
  