function isDate(target) {
  if (target === null ||
    typeof target !== 'object' ||
    typeof target.toString !== 'function' ||
    typeof target.valueOf !== 'function'
  ) return false
  const typeCastingResult = '' + target
  const toStringResult = target.toString()
  if (toStringResult !== typeCastingResult) return false
  const valueOfResult = '' + target.valueOf()
  return valueOfResult !== typeCastingResult
}