convertToExcelDate

Use <code>convert_to_excel_date()</code> in new code

internal

Simplifies the creation of 'xlsx' files by
providing a high level interface to writing, styling and editing
worksheets.

<dl><dt>df</dt>
<dd>dataframe</dd>
<dt>date1904</dt>
<dd>take different origin</dd></dl>

<dl>

<dt>df</dt>
<dd>dataframe</dd>


<dt>date1904</dt>
<dd>take different origin</dd>

</dl>