h">date_time::nth_kday_of_month</a><span class="special">&lt;</span> <span class="identifier">date_type</span> <span class="special">&gt;</span>       <a name="boost.date_time.us_dst_rules.nkday"></a><span class="identifier">nkday</span><span class="special">;</span>             
  <span class="keyword">typedef</span> <a class="link" href="dst_calculator.html" title="Class template dst_calculator">dst_calculator</a><span class="special">&lt;</span> <span class="identifier">date_type</span><span class="speci