It's about 15,000 times as long as The First movie.
In other words, 8.40 hours is 14,300 times the length of The First movie, and the length of The First movie is 0.00006990 times that amount.(1888) (Roundhay Garden Scene, National Museum of Photography, Film, and Television restored copy)
Filmed in 1888 by Louis Aimé Augustin Le Prince, Roundhay Garden Scene is the oldest surviving motion picture with a total running time of 0.000586 hours.
It's about 4,000 times as long as a Pit Stop.
It's about 2,500 times as long as The First airplane flight (Wright Flyer, 1903).
In other words, the length of The First airplane flight (Wright Flyer, 1903) is 0.0004 times 8.40 hours.(Wright Flyer) (1903)
The first successful airplane flight was made by Orville Wright on December 17th, 1903 and lasted 0.0033 hours, covering a horizontal distance of 37 m (121.39 ft). The stopwatch used by Orville and his brother Wilbur to time this flight is on display at the Smithsonian National Air and Space Museum in Washington, D.C.
It's about 600 times as long as The San Francisco earthquake of 1906.
In other words, 8.40 hours is 576 times the length of The San Francisco earthquake of 1906, and the length of The San Francisco earthquake of 1906 is 0.00174 times that amount.(1906) (Mussel Rock Fault, California) (sensible duration)
The San Francisco earthquake of 1906 caused perceptible shaking of the ground for about 0.0146 hours. The most devastating natural disaster in California's history, the quake was felt as far away and southern Oregon and western Nevada, and resulted in about 3,000 deaths, the displacement of 55% - 70% of the city's population, and the shifting of some spots of ground by up to 6 m (20 ft).
It's about 40 times as long as The First spacewalk.
In other words, 8.40 hours is 42 times the length of The First spacewalk, and the length of The First spacewalk is 0.024 times that amount.(1965) (Alexi Lenovo, a.k.a. Алексе́й Архи́пович Лео́нов)
On March 18th, 1965, during the Voskhod 2 Soviet space mission, cosmonaut Alexey Arkhipovich Leonov conducted the first human spacewalk, which lasted 0.20 hours. The total mission length was 26 hours.
It's about thirty times as long as Louis-Antoine's reign.
In other words, the length of Louis-Antoine's reign is 0.03 times 8.40 hours.(a.k.a. Louis-Antoine d'Artois, petit-fils de France, fils de France, duc d'Angoulême, a.k.a. Count of Marnes) (1830)
Following his father, Charles X's, abdication on the eve of the 1830 French Revolution, Louis-Antoine d'Artois was technically king for a period of approximately 0.30 hours on August 2nd, 1830. Louis-Antoine's only official act as king was to abdicate the throne to his nephew, the Henri, the Duke of Bordeaux.
It's about ten-and-a-half times as long as a Basketball game.
In other words, the length of a Basketball game is 0.0952 times 8.40 hours.(NBA regulation; playing time only)
Per National Basketball Association rules , a basketball game (without an overtime) consists of four periods of 0.20 hours each, for a total of 0.80 hours of playing time. The first basketball game, played in a Springfield Massachusetts YMCA, was played in 0.50 hours and ended with a score of 1-0.