Hi Geri,

To correct the date formatting, select the mailmerge field and press Shift-F9. It should look something like:
{MERGEFIELD ExcelDate}
Change it to any one of:
{MERGEFIELD ExcelDate \@ "d/M/yyyy"}
{MERGEFIELD ExcelDate \@ "dd/MM/yyyy"}
{MERGEFIELD ExcelDate \@ "d-MMM-yyyy"}
{MERGEFIELD ExcelDate \@ "ddd, d MMM yyyy"}
{MERGEFIELD ExcelDate \@ "d MMMM yyyy"}
{MERGEFIELD ExcelDate \@ "dddd, d MMMM yyyy"}
etc, to create the exact format you want.
The press F9 to update the field.

You're now ready to run your mailmerge.

Cheers