# C1.Schedule.CalendarInfo.GetFirstWeekDay

## Content

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<h1 id="C1_Schedule_CalendarInfo_GetFirstWeekDay_" data-uid="C1.Schedule.CalendarInfo.GetFirstWeekDay*">GetFirstWeekDay Method
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<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="C1_Schedule_CalendarInfo_GetFirstWeekDay_" data-uid="C1.Schedule.CalendarInfo.GetFirstWeekDay*"></a>
<h4 id="C1_Schedule_CalendarInfo_GetFirstWeekDay_System_DateTime_" data-uid="C1.Schedule.CalendarInfo.GetFirstWeekDay(System.DateTime)">GetFirstWeekDay(DateTime)</h4>
<div class="markdown level1 summary"><p>Returns the first day of week, containing specified date.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public DateTime GetFirstWeekDay(DateTime day)</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Function GetFirstWeekDay(day As Date) As Date</code></pre>
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<h5 class="parameters">Parameters</h5>
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  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
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      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.datetime">DateTime</a></td>
      <td><span class="parametername">day</span></td>
      <td><p>The <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.datetime">DateTime</a> value.</p>
</td>
    </tr>
  </tbody>
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<h5 class="returns">Returns</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.datetime">DateTime</a></td>
      <td><p>The <a class="xref" href="https://learn.microsoft.com/dotnet/api/system.datetime">DateTime</a> value of the week start day.</p>
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    </tr>
  </tbody>
</table>
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