To build the query:
  1. Navigate to Control > Query
  2. Click New > All Contacts Query
  3. In the Available Fields for Search window, expand Contacts > Record Management > Record Info and select Date Created
  4. Click Add and then select Equals (=), then enter the date the records for which you're searching were created and click Next
  5. Select the fields you would like to output
  6. Click Finish
Note: This will include ALL contacts created on this date, not just the ones you imported.  If new records were created from events, forms, etc., in the system, they will also be included in this query for that day.