The default date format for Nintex Forms 2013 is the UK DD/MM/YYYY and for customers located anywhere else like US for example they have a different date format which is MM/DD/YYYY. The demand is the need to change the date format in SharePoint to reflect the local calendar of the user.

The function formatDate can be used as follows:
formatDate(date, format) or formateDate({namedControl}, "D")

Note:

• In the format string, using single or double quotes is required. Using no quotes results in an error.