You have the option to adjust the format of date and time fields represented in tables of your portal views. Change the following properties in the portal-common-messages*.properties file, residing in the ipp-portal-common.jar file of your Stardust installation:
Once you update the portal-common-messages*.properties file, the same date format would be reflected across the portal.
To change the property values, unpack the ipp-portal-common.jar file and edit the portal-common-messages*.properties.
For example, the default values for the English resource bundles are:
portalFramework.formats.defaultDateTimeFormat=MM/dd/yy hh:mm a portalFramework.formats.defaultDateFormat=MM/dd/yy portalFramework.formats.defaultTimeFormat=hh:mm a
With these values, a date time entry is displayed in the following way:

Figure: Date Format MM/dd/yy hh:mm a
Changing the defaultDateTimeFormat to:
portalFramework.formats.defaultDateTimeFormat=dd.MM.yy HH:mm
would result in a date time entry displayed in the following way:

Figure: Date Format dd.MM.yy HH:mm