docs: function _toDate (ndate, nrandom, nchecksum, epoc, id) {
    // Guard
    if (!_isValid(ndate, nrandom, nchecksum, id)) throw new Error('identity#toDate: Invalid Id');
  
    // Calculate
    var bits = baseURL.decode(id),
      dateBits = bits.slice(0, ndate);
    return new Date(parseInt(dateBits, 2) + epoc.getTime());
  }