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<a name="localtime_002d_002d_002dconvert-time-to-local-representation"></a>
<h3 class="section">8.6 <code>localtime</code>&mdash;convert time to local representation</h3>
<a name="index-localtime"></a>
<a name="index-localtime_005fr"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;time.h&gt;
struct tm *localtime(time_t *<var>clock</var>);
struct tm *localtime_r(time_t *<var>clock</var>, struct tm *<var>res</var>);

</pre></div>
<p><strong>Description</strong><br>
<code>localtime</code> converts the time at <var>clock</var> into local time, then
converts its representation from the arithmetic representation to the
traditional representation defined by <code>struct tm</code>.
</p>
<p><code>localtime</code> constructs the traditional time representation in static
storage; each call to <code>gmtime</code> or <code>localtime</code> will overwrite the
information generated by previous calls to either function.
</p>
<p><code>mktime</code> is the inverse of <code>localtime</code>.
</p>
<br>
<p><strong>Returns</strong><br>
A pointer to the traditional time representation (<code>struct tm</code>).
</p>
<br>
<p><strong>Portability</strong><br>
ANSI C requires <code>localtime</code>.
</p>
<p><code>localtime</code> requires no supporting OS subroutines.
</p>
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