1. Open the saved query.
  2. On the Criteria Tab, highlight the specific parameter that includes the date range on the right hand side under Apply filters to these fields.
  3. Select the Change button at the bottom to open the specific felid for editing.
  4. Make changes to the date range as needed.
  5. Run the query to see the updated results.
  6. Save the Query.

If desired, you can create the Query to prompt for a date each time it is run.