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<div class="refentry">
<a name="boost.date_time.eu_dst_trait"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Struct template eu_dst_trait</span></h2>
<p>boost::date_time::eu_dst_trait &#8212; Rules for daylight savings start in the EU (Last Sun in Mar) </p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../date_time/doxy.html#header.boost.date_time.local_timezone_defs_hpp" title="Header &lt;boost/date_time/local_timezone_defs.hpp&gt;">boost/date_time/local_timezone_defs.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> date_type<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="eu_dst_trait.html" title="Struct template eu_dst_trait">eu_dst_trait</a> <span class="special">{</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">day_of_week_type</span>                <a name="boost.date_time.eu_dst_trait.day_of_week_type"></a><span class="identifier">day_of_week_type</span><span class="special">;</span>  
  <span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">month_type</span>                      <a name="boost.date_time.eu_dst_trait.month_type"></a><span class="identifier">month_type</span><span class="special">;</span>        
  <span class="keyword">typedef</span> <span class="identifier">date_type</span><span class="special">::</span><span class="identifier">year_type</span>                       <a name="boost.date_time.eu_dst_trait.year_type"></a><span class="identifier">year_type</span><span class="special">;</span>         
  <span class="keyword">typedef</span> <a class="link" href="last_kday_of_month.html" title="Class template last_kday_of_month">date_time::last_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.eu_dst_trait.start_rule_functor"></a><span class="identifier">start_rule_functor</span><span class="special">;</span>
  <span class="keyword">typedef</span> <a class="link" href="last_kday_of_month.html" title="Class template last_kday_of_month">date_time::last_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.eu_dst_trait.end_rule_functor"></a><span class="identifier">end_rule_functor</span><span class="special">;</span>  

  <span class="comment">// <a class="link" href="eu_dst_trait.html#idp515764528-bb">public static functions</a></span>
  <span class="keyword">static</span> <span class="identifier">day_of_week_type</span> <a class="link" href="eu_dst_trait.html#idp515765088-bb"><span class="identifier">start_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">month_type</span> <a class="link" href="eu_dst_trait.html#idp515766896-bb"><span class="identifier">start_month</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">day_of_week_type</span> <a class="link" href="eu_dst_trait.html#idp515768704-bb"><span class="identifier">end_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">month_type</span> <a class="link" href="eu_dst_trait.html#idp515770512-bb"><span class="identifier">end_month</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">int</span> <a class="link" href="eu_dst_trait.html#idp515772320-bb"><span class="identifier">dst_start_offset_minutes</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">int</span> <a class="link" href="eu_dst_trait.html#idp515773456-bb"><span class="identifier">dst_end_offset_minutes</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">int</span> <a class="link" href="eu_dst_trait.html#idp515774576-bb"><span class="identifier">dst_shift_length_minutes</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">date_type</span> <a class="link" href="eu_dst_trait.html#idp515775712-bb"><span class="identifier">local_dst_start_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">date_type</span> <a class="link" href="eu_dst_trait.html#idp515777520-bb"><span class="identifier">local_dst_end_day</span></a><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp201032816"></a><h2>Description</h2>
<p>These amount to the following:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p>Start of dst day is last Sunday in March</p></li>
<li class="listitem"><p>End day of dst is last Sunday in Oct</p></li>
<li class="listitem"><p>Going forward switch time is 2:00 am (offset 120 minutes)</p></li>
<li class="listitem"><p>Going back switch time is 3:00 am (off set 180 minutes)</p></li>
<li class="listitem"><p>Shift duration is one hour (60 minutes) </p></li>
</ul></div>
<p>
</p>
<div class="refsect2">
<a name="idp201036160"></a><h3>
<a name="idp515764528-bb"></a><code class="computeroutput">eu_dst_trait</code> public static functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">day_of_week_type</span> <a name="idp515765088-bb"></a><span class="identifier">start_day</span><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">month_type</span> <a name="idp515766896-bb"></a><span class="identifier">start_month</span><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">day_of_week_type</span> <a name="idp515768704-bb"></a><span class="identifier">end_day</span><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">month_type</span> <a name="idp515770512-bb"></a><span class="identifier">end_month</span><span class="special">(</span><span class="identifier">year_type</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">int</span> <a name="idp515772320-bb"></a><span class="identifier">dst_start_offset_minutes</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">int</span> <a name="idp515773456-bb"></a><span class="identifier">dst_end_offset_minutes</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">int</span> <a name="idp515774576-bb"></a><span class="identifier">dst_shift_length_minutes</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">date_type</span> <a name="idp515775712-bb"></a><span class="identifier">local_dst_start_day</span><span class="special">(</span><span class="identifier">year_type</span> year<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">date_type</span> <a name="idp515777520-bb"></a><span class="identifier">local_dst_end_day</span><span class="special">(</span><span class="identifier">year_type</span> year<span class="special">)</span><span class="special">;</span></pre></li>
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