title: Excel date format using EPPlus
body: <p>I'm having trouble with format my cells to Date.</p>
  
  <pre><code>FileInfo info = new FileInfo(path);
  using (ExcelPackage package = new ExcelPackage(info))
  {
        ExcelWorksheet ws = package.Workbook.Worksheets.Add(sheetName);
        ws.Cells[3, 1].Style.Numberformat.Format = "yyyy-mm-dd";
        ws.Cells["A3"].Formula = "=DATE(2014,10,5)";
  }
  </code></pre>
  
  <p>Output from this in Excel: 41 917,00</p>
  
  <p>Why is this not working? </p>