Hi,
You can convert the date to string and export the data as shown below.
// Using date2str function xlsWorkSheet.cells().item(row,3).value(date2Str(Table_name.StartDate, 213, 2, DateSeparator::Slash, 2, DateSeparator::Slash, 2,true));
//(or) xlsWorkSheet.cells().item(row,4).value(strfmt('%1', Table_name.StartDate));