ass template date_itr_base">date_itr_base</a> <span class="special">&amp;</span> <a class="link" href="date_itr_base.html#id-1_3_12_15_3_20_1_1_1_7_2-bb"><span class="keyword">operator</span><span class="special">--</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">virtual</span> <span class="identifier">duration_type</span> <a class="link" href="date_itr_base.html#id-1_3_12_15_3_20_1_1_1_7_3-bb"><span class="identifier">get_offset</