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matt / New Userscript 

// ==UserScript==
// @name         New Userscript
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://www.zhihu.com/question/*
// @require     http://code.jquery.com/jquery-1.11.2.min.js
// @grant        none
// @license     MIT
// ==/UserScript==

(function () {
  'use strict';

  console.log($("#root > div > main > div > meta:nth-child(6)").attr('content'))
  $("#root > div > main > div > div:nth-child(11) > div.QuestionHeader > div.QuestionHeader-content > div.QuestionHeader-main > h1").append(
    "<div>question created at:" + new Date($("#root > div > main > div > meta:nth-child(6)").attr('content')).toLocaleString() + "</div>"
  )
})();