Have you remembered to “spring forward" yet? If you were up very early on Sunday morning, you might’ve noticed the clock on your phone suddenly jumped an hour into the future—don’t forget to reset your watch, too! This leap marked the beginning of Daylight Saving Time, the period from the second Sunday in March to the first Sunday in November when clocks are set one hour ahead of Standard Time. While the extra hour of sleep gained during the return in the fall to Standard Time is quite popular amongst night owls and college students, this biannual time adjustment is also responsible for plenty of headaches. One of the complications it creates is also an interesting engineering problem—how do you make sure everyone is “on time”?