A convertible car that only went on the market in 1957 was used during the parade on July 4, 1956 in the film.
Rong’s family watched Kennedy’s Washington inauguration on TV, showing the weather below freezing. At the same time, at Kovik's home in Long Island, New York, the weather showed early autumn.
At the Republic Conference held in Miami Beach in 1972, you can see a Jackie Gleason Street sign, which was actually named after Gleason's death in the late 1980s.
In the film, on July 4, 1969, the Kovic family was watching a TV show called "Rowan & Martin's Laugh-In". The show started in 1968 and aired every Monday night, and on July 4, 1969 This day is Friday.
When Rong was considering what to take with him in his room, he stuffed a toy gun into his bag, and this model gun first appeared in 1983
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