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<!DOCTYPE html>
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<head>
<meta http-equiv="Content-Security-Policy" content="connect-src https:; default-src chrome:; object-src 'none'">
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<title>How to troubleshoot time related errors on secure websites</title>
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<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 & language</span>.</li>
<li> In the<span class="menu">Date & 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 & 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 & 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>
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