In the Spring, we spring forward, by pretending to time travel into the future 1 hour. But the reality is that we're moving *our* method for measuring time backward within the real flow time. Whaaat? Yea. Chew on that relativity for a minute, or sixty. It's the opposite deal when we "Fall" back. We set our clocks back an hour, thereby moving our measurement system forward an hour, within the actual flow of time.
This visualization illustrates how our time (the clock) moves backward and forward within the actual flow of time, and how that jump relates the annual timing of sunset and sunrise. The sunset and sunset times are not exact to a specific location. They represent the general trend across the United States. As such, there are so specific times labeled. That said, I based the curve off data from www.timeanddate.com and this great graph on Chicago Day Light Savings, which inspired my iteration.