">virtual</span> <span class="keyword">bool</span> <a name="id-1_3_12_15_6_3_1_1_1_10_5-bb"></a><span class="identifier">has_dst</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>True if zone uses daylight savings adjustments. </li>
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<pre class="literallayout"><span class="keyword">virtual</span> <span class="identifier">posix_time</span><span class="special">::</span><span class="identifier">ptime</s