Daylight saving time ends at 2 a.m. local time Sunday, which means you should set your clock back an hour before you go to ...

The clock going back for winter is far less disruptive than the spring shift, which has been linked to spikes in heart ...

Your biological clock, or circadian rhythm, is the 24-hour cycle that guides your sleep, hunger, body temperature, and energy levels. Controlled by a “master clock” in your brain, it syncs with light ...

Armies started using the 24-hour method of timekeeping as standard military time because, much like police, fire, and medical departments, every branch of the armed services is in continuous operation ...