# GrapeCity.Spreadsheet.IWorkbook.Date1904

## Content

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<h1 id="GrapeCity_Spreadsheet_IWorkbook_Date1904_" data-uid="GrapeCity.Spreadsheet.IWorkbook.Date1904*">Date1904 Property
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<a id="GrapeCity_Spreadsheet_IWorkbook_Date1904_" data-uid="GrapeCity.Spreadsheet.IWorkbook.Date1904*"></a>
<h4 id="GrapeCity_Spreadsheet_IWorkbook_Date1904" data-uid="GrapeCity.Spreadsheet.IWorkbook.Date1904">Date1904</h4>
<div class="markdown level1 summary"><p>Gets or sets whether the date system used to convert a date to a serial value starts since 1/1/1904.</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">bool Date1904 { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Property Date1904 As Boolean</code></pre>
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<h5 class="propertyValue">Property Value</h5>
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      <th>Type</th>
      <th>Description</th>
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      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.boolean">bool</a></td>
      <td><p><code>true</code>, if the date system starts in 1904; otherwise, <code>false</code>. Default is <code>false</code>.</p>
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    </tr>
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<h5 id="GrapeCity_Spreadsheet_IWorkbook_Date1904_remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>All workbooks in the same workbook set share same value of <a class="xref" href="GrapeCity.Spreadsheet.IWorkbook.Date1904.html#GrapeCity_Spreadsheet_IWorkbook_Date1904">Date1904</a>.</p>
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