april, 2018 Patriots Day Weekend 21apr(apr 21)9:00 am22(apr 22)5:00 pmPatriots Day Weekend Event DetailsCommemorate the opening of the American Revolution in 1775. Free admission for veterans and active duty military. Event Details Commemorate the opening of the American Revolution in 1775. Free admission for veterans and active duty military. Time 21 (Saturday) 9:00 am - 22 (Sunday) 5:00 pm LocationOld Fort Niagara CalendarGoogleCal