nslate"><span class="pre">&lt;format_string&gt;</span></code> is given, it will default to:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>%Y-%m-%dT%H:%M:%S    for local time.
%Y-%m-%dT%H:%M:%SZ   for UTC.
</pre></div>
</div>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.8: </span>If the <code class="docutils literal notranslate"><span class="pre">SOURCE_DATE_EPOCH</span></code> environment variable is set,
its value will be used ins