When you create a date/time field, the Binding tab presents data binding options that you can apply to the field. Options that are not specifically related to creating a data connection apply both to data bound to a data source and data saved to a file when the object is not bound to a data source.
Disables data binding. Because the object will not capture or display merged data, any information associated with the object is not written as output when the form data is saved/submitted.
  
See also  

Date/time field properties in the Binding tab