2020 Specific Information for Windsor Fair Location: Windsor Fair 4-H Exhibition Hall in Main Exhibition Hall Dates: Postponed until August and September 2021 Hall Exhibits:  Open to Kennebec, Knox-Lincoln, Waldo, Androscoggin and Sagadahoc Counties. Other counties can exhibit upon request to Extension staff, call Alisha Targonski at 207.622.7546 Club Table Exhibit Premiums: See General Rules.