At run time, LiveCycle Designer ES displays date, time, and numeric field values in locale-sensitive format. If you want to display a field value in a format other than the default, you can specify the custom pattern by clicking the Patterns button on the Field tab.
Note:
Drop-down lists support custom user entries, but a display pattern for custom user entries cannot be specified. You can write a script to format the user input if required.
Because the display pattern describes how data will be displayed in the form, all default values, user-entered values, and values retrieved from a database are converted to the format described by the display pattern.
See also 

To specify a display pattern