4th of July Firework Shows, The spectacular Macy’s July 4th fireworks display is moving across town in 2009. To celebrate the 400th anniversary of the exploration of the Hudson River by Henry Hudson, Macy’s will stage a showstopping pyrotechnic show over the Hudson River instead of the East River this year.( happy 4th of july comments ) The Macy’s July 4th fireworks display originally made its debut on the Hudson River in 1958 before becoming an East River tradition in 1976. Macy’s 4th