Hi all,
the format of Date Signed field cannot be changed at the user level, but only by the Admin.
I work in Europe for a US company and this means that I am stuck with the US format of the date signed (mm-dd-yyyy), which effectively makes it useless because it confounds anyone outside the US.
So my suggestion would be to let users modify this setting for themselves, so that it is viable for organizations that are spread around different countries with different formats.