Go to the Settings menu, Document Properties, Triggers, OnOpen, Add a new action, Type Selection, Action Select in Field, and specify the field and the string you want to select in that field. For example, for Field Date, search in string
Although this is the default selection, you can clear it, lock it or do any new selections. Whenever you open the document again, this will be selected if the document was not saved in a different state (i.e.: selecting values that explicitly exclude the selection in that Date).
Hope that helps.