Joshua Steed says he is regressing back to an ape but Charles Darwin didn't publish his theory of evolution till 1859. Almost 30 years after the time period in the film.
Crew or equipment visible
While Joseph Smith chases through the woods, cords from the
boom mic come into full view for almost two seconds.
Nathan states to Joshua that Sunday, October 3, is their Ma's birthday, but if the movie took place in the year 1827, October 3 is a Wednesday. Otherwise, it means the movie took place in 1824, or possibly the futures of 1830 or 1841.