span class="pre">one</span></code></div>
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<section id="leap-year-1">
<span id="datep-0-leap-year-1"></span><span id="index-2"></span><h3><a class="toc-backref" href="#contents" role="doc-backlink"><code class="docutils literal notranslate"><span class="pre">leap_year/1</span></code></a><a class="headerlink" href="#leap-year-1" title="Link to this heading"></a></h3>
<p>True if the argument is a leap year.</p>
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<div class="line"><stron