The time stopping of the city at a certain day of the year does not refer to the Warsaw uprising. Twice a year in Korea they practice evacuation drill for all citizens in preparation for an attack from North Korea.
The T-shirt of the boy who delivers the black beans noodles reads "WHERE HAS HE GONE?", a clear reference to the plot of the movie.
In 2011, CJ Entertainment announced an American remake, with Mark Waters attached as director and Michael Goldbach as screenwriter.