“Your clock is set to a 24-hour rhythm, though sometimes it’s a little shorter or longer,” she says. Essentially, the circadian rhythm is crucial to establishing what our body and mind do ...

This clock tells the time using set theory and 24-hour time. From the top down: the blinking yellow circle of light at the top indicates the passing seconds; on for even seconds and off for odd.

This means that when clocks reach 2 a.m. local time, they should be set back one hour to 1 a.m ... you'll still have to remember to change the time on your non-smart devices: microwaves, analog ...