---
title: Date.now()
slug: Web/JavaScript/Reference/Global_Objects/Date/now
translation_of: Web/JavaScript/Reference/Global_Objects/Date/now
---
<div>{{JSRef}}</div>

<p><strong><code>Date.now()</code></strong> 메소드는 UTC 기준으로 1970년 1월 1일 0시 0분 0초부터 현재까지 경과된 밀리 초를 반환합니다.</p>

<h2 id="문법">문법</h2>

<pre class="syntaxbox"><code>var timeInMs = Date.now();</code></pre>

<h3 id="인자">인자</h3>

<p>없음</p>

<h2 id="설명">설명</h2>

<p>now() 메소드는 1970년 1월 1일 0시 0분 0초부터 현재까지 경과된 밀리 초를 {{jsxref("Number")}} 형으로 반환합니다.</p>

<p>now()는 {{jsxref("Date")}}의 정적 메소드이기 때문에, 항상 <code>Date.now() 처럼 사용하셔야 합니다.</code></p>

<h2 id="Polyfill">Polyfill</h2>

<p>이 메소든는 ECMA-262 5판에서 표준화되었습니다. 아직 이 메소드를 지원하도록 갱신되지 않은 엔진들은 이 메소드의 미지원에 대한 차선책으로 다음 코드를 활용하실 수 있습니다.</p>

<pre class="brush: js">if (!Date.now) {
  Date.now = function now() {
    return new Date().getTime();
  };
}
</pre>

<h2 id="Specifications">Specifications</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('ES5.1', '#sec-15.9.4.4', 'Date.now')}}</td>
   <td>{{Spec2('ES5.1')}}</td>
   <td>Initial definition. Implemented in JavaScript 1.5.</td>
  </tr>
  <tr>
   <td>{{SpecName('ES6', '#sec-date.now', 'Date.now')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-date.now', 'Date.now')}}</td>
   <td>{{Spec2('ESDraft')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

<div>{{CompatibilityTable}}</div>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatChrome("5")}}</td>
   <td>{{CompatGeckoDesktop("1.9")}}</td>
   <td>{{CompatIE("9")}}</td>
   <td>{{CompatOpera("10.50")}}</td>
   <td>{{CompatSafari("4")}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Chrome for Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="See_also">See also</h2>

<ul>
 <li>{{domxref("Performance.now()")}} — provides timestamps with sub-millisecond resolution for use in measuring web page performance</li>
 <li>{{domxref("console.time()")}} / {{domxref("console.timeEnd()")}}</li>
</ul>