<!DOCTYPE html>
<!-- This Source Code Form is subject to the terms of the Mozilla Public
  - License, v. 2.0. If a copy of the MPL was not distributed with this
   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
<html>
  <head>
    <meta
      http-equiv="Content-Security-Policy"
      content="connect-src https:; default-src chrome:; object-src 'none'"
    />
    <meta name="referrer" content="no-referrer" />
    <meta charset="UTF-8" />
    <link
      rel="stylesheet"
      type="text/css"
      href="chrome://global/skin/offlineSupportPages.css"
    />
    <link
      rel="icon"
      type="image/png"
      id="favicon"
      href="chrome://branding/content/icon32.png"
    />
    <title>How to troubleshoot time related errors on secure websites</title>
  </head>
  <body>
    <div id="offlineSupportContainer">
      <h1>How to troubleshoot time related errors on secure websites</h1>
      <p>
        Certificates for secure websites (the address begins with
        <strong>https://</strong>) are valid only for a certain period of time.
        If a website presents a certificate with validity dates that don't match
        the date on your computer's clock, Firefox can't verify that it is
        secure and will show you an error page.
      </p>
      <p>
        Such issues can often be fixed by setting the correct date, time and
        time zone on your computer system. If this does not solve the problem,
        it could be caused by other issues, such as a misconfigured web server
        or an expired certificate.
      </p>
      <div id="toc">
        <h2>Table of Contents</h2>
        <ul>
          <li class="toclevel-1">
            <a href="#w_list-of-time-related-error-codes-you-may-encounter">
              <span class="tocnumber">1</span>
              <span class="toctext"
                >List of time-related error codes you may encounter</span
              >
            </a>
          </li>
          <li class="toclevel-1">
            <a href="#w_set-your-system-clock-to-the-correct-time">
              <span class="tocnumber">2</span>
              <span class="toctext"
                >Set your system clock to the correct time</span
              >
            </a>
          </li>
          <li class="toclevel-1">
            <a href="#w_contact-the-website-owner">
              <span class="tocnumber">3</span>
              <span class="toctext">Contact the website owner</span>
            </a>
          </li>
          <li class="toclevel-1">
            <a href="#w_bypass-the-warning">
              <span class="tocnumber">4</span>
              <span class="toctext">Bypass the warning</span>
            </a>
          </li>
        </ul>
      </div>
      <h1 id="w_list-of-time-related-error-codes-you-may-encounter">
        List of time-related error codes you may encounter
      </h1>
      <div class="for" data-for="fx66">
        <div class="note">
          <strong>Note:</strong> A <em>Your Computer Clock is Wrong</em> error
          page almost certainly means that your computer's clock is set to the
          wrong date. Some time-related errors will show a
          <em>Warning: Potential Security Risk Ahead</em> error page. For other
          time-related errors, you'll get a <em>Secure Connection Failed</em> or
          <em>Did Not Connect: Potential Security Issue</em> error page.
        </div>
        <p>
          <span class="for" data-for="=fx66"></span>
          <span class="for" data-for="fx67"></span>
        </p>
        <p>
          Click
          <span class="for" data-for="not fx67">
            <span class="button">More Information</span> or
            <span class="button">Advanced…</span>, depending on the error page,
          </span>
          <span class="for" data-for="fx67">
            <span class="button">Advanced…</span> on the error page</span
          >
          to view the error code. One of the following error codes will indicate
          that the secure connection couldn't be established due to a
          time-related error:
        </p>
      </div>
      <div class="for" data-for="not fx66">
        <div class="note">
          <strong>Note:</strong> If you get a
          <em>Your connection is not secure</em> error page, click the
          <span class="button">Advanced</span> button to view the error code and
          other details. A <em>Secure Connection Failed</em> error page may also
          indicate a time-related error.
        </div>
        <p>
          One of the following error codes will indicate that the secure
          connection couldn't be established due to a time-related error:
        </p>
      </div>
      <p>
        <sub>SEC_ERROR_EXPIRED_CERTIFICATE</sub><br />
        <sub>SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE</sub><br />
        <sub>SEC_ERROR_OCSP_FUTURE_RESPONSE</sub><br />
        <sub>SEC_ERROR_OCSP_OLD_RESPONSE</sub><br />
        <sub>MOZILLA_PKIX_ERROR_NOT_YET_VALID_CERTIFICATE</sub><br />
        <sub>MOZILLA_PKIX_ERROR_NOT_YET_VALID_ISSUER_CERTIFICATE</sub>
      </p>
      <p>
        The text on the error page will warn you when Firefox detects that your
        system date and time is probably wrong and will also show the date and
        time currently set in your system. If the clock settings are incorrect
        you should set it to the right time<span class="for" data-for="win,mac">
          as explained below</span
        >. Even if the displayed time settings seem to be correct, you should
        make sure that the time zone settings of your system match your current
        location.
      </p>
      <h1 id="w_set-your-system-clock-to-the-correct-time">
        Set your system clock to the correct time
      </h1>
      <p>
        Time-related errors on secure websites caused by a skewed system clock
        can be resolved by setting your correct date, time and time zone<span
          class="for"
          data-for="mac"
          >:</span
        ><span class="for" data-for="win,linux">.</span>
        <span class="for" data-for="win">
          Change your date and time settings from the clock on the Windows
          taskbar or follow these instructions:</span
        >
      </p>
      <div class="for" data-for="win10">
        <h2>If your are on Windows 10:</h2>
        <ol>
          <li>
            Click the Windows Start button or press the Windows key<span
              class="key"
            ></span
            >.
          </li>
          <li>In the Start menu, select<span class="menu">Settings</span>.</li>
          <li>
            In Settings, select<span class="menu">Time &amp; language</span>.
          </li>
          <li>
            In the<span class="menu">Date &amp; time</span> section you can
            review the current date and time settings. To change your settings
            click on <span class="button">Change</span> below
            <span class="menu">Change date and time</span> or expand the
            <span class="menu">Time zone</span> dropdown menu.
            <div class="note">
              If your system is set to manage the time and time zone
              automatically, you cannot make manual changes.
            </div>
          </li>
          <li>If you are done with your changes, close the Settings window.</li>
        </ol>
      </div>
      <div class="for" data-for="win8">
        <h2>If your are on Windows 8:</h2>
        <ol>
          <li>
            From the Start Screen, click the <strong>Desktop</strong> tile. The
            Desktop view will open.
          </li>
          <li>
            From the Desktop, hover in the lower right-hand corner to access the
            Charms.
          </li>
          <li>
            Select <span class="menu">Control Panel</span> from the
            <span class="menu">Settings</span> charm. The Control Panel window
            will open.
            <dl>
              <dd></dd>
            </dl>
          </li>
          <li>
            In the Control Panel window, click on
            <strong>Clock, Language, and Region</strong> and then
            <strong>Date and Time</strong>.
          </li>
          <li>
            The panel that opens shows the current date and time settings. To
            change your settings click the
            <span class="button">Change date and time</span> or
            <span class="button">Change time zone</span> button.
          </li>
          <li>To confirm your changes click <span class="button">OK</span>.</li>
        </ol>
      </div>
      <div class="for" data-for="win7">
        <h2>If your are on Windows 7:</h2>
        <ol>
          <li>
            Click the Windows Start button or press the Windows key
            <span class="key"></span>.
          </li>
          <li>
            In the Start Menu, click <span class="menu">Control Panel</span>.
            <dl>
              <dd></dd>
            </dl>
          </li>
          <li>
            In the Control Panel window, click on
            <strong>Clock, Language, and Region</strong> and then
            <strong>Date and Time</strong>.
          </li>
          <li>
            The panel that opens shows the current date and time settings. To
            change your settings click the
            <span class="button">Change date and time</span> or
            <span class="button">Change time zone</span> button.
          </li>
          <li>To confirm your changes click <span class="button">OK</span>.</li>
        </ol>
      </div>
      <div class="for" data-for="mac">
        <h2>If your are on Mac OS:</h2>
        <ol>
          <li>
            Click the Apple menu and select
            <span class="menu">System Preferences</span>.
          </li>
          <li>
            In the System Preferences window, click on
            <strong>Date &amp; Time</strong>.
          </li>
          <li>
            The panel that opens shows the current date and time settings. In
            order to adjust them, disable
            <span class="pref">Set date and time automatically</span>, manually
            enter the date and time and click
            <span class="button">Save</span> to confirm your changes.
          </li>
          <li>
            In order to review your time zone settings, click on the
            <strong>Time Zone</strong> tab. In order to adjust your time zone,
            disable
            <span class="pref"
              >Set time zone automatically using current location</span
            >, click onto your approximate location in the map and select the
            city closest to you in the dropdown panel.
          </li>
          <li>
            If you are done with your changes, close the Date &amp; Time window.
          </li>
        </ol>
      </div>
      <div class="note">
        <strong>Note:</strong> If the clock on your device constantly resets
        after you power it off, this might indicate that the battery cell that
        runs the real-time clock is getting low or is empty. Please consult your
        manufacturer's manual on how to replace the CMOS battery.
      </div>
      <h1 id="w_contact-the-website-owner">Contact the website owner</h1>
      <p>
        If you get a time related error on a secure website and you have already
        checked the correct settings of your system’s clock, please contact the
        owner of the website which you can’t access and inform them of the
        problem. The website owner might need to renew the expired certificate,
        for example.
      </p>
      <div class="for" data-for="not fx66">
        <h1 id="w_bypass-the-warning">Bypass the warning</h1>
        <div class="warning">
          <strong>Warning:</strong> You should never bypass the warning for a
          legitimate major website or sites where financial transactions take
          place – in this case an invalid certificate can indicate that your
          connection is compromised by a third party.
        </div>
        <p>
          If you see a <em>Your connection is not secure</em> warning page and
          the website allows it, you can add an exception to be able to visit
          the site, despite the fact that the certificate is not trusted by
          default:
        </p>
        <ol>
          <li>
            On the warning page, click <span class="button">Advanced</span>.
          </li>
          <li>
            Click <span class="button">Add Exception…</span>. The
            <em>Add Security Exception</em> dialog will appear.
          </li>
          <li>
            Read the text describing the problems with the website. You can
            click <span class="button">View…</span>
            to closer inspect the untrusted certificate.
          </li>
          <li>
            Click <span class="button">Confirm Security Exception</span> if you
            are sure you want to trust the site.
          </li>
        </ol>
      </div>
    </div>
  </body>
</html>
