There is no need to format your own format, you can use one of the standard dates or default date formats
- Total date
- Long term date
- Average date
- Short date
/ , .
, 31 2009 " " 12/31/2009, 31/12/2009.
XML- :
<Style ss:ID="DateLiteral">
<NumberFormat ss:Format="Short Date"/>
</Style>
<Row>
<Cell ss:StyleID="DateLiteral">
<Data ss:Type="DateTime">2009-12-31T00:00:00.000</Data>
</Cell>
</Row>