Circadian researchers explain why a single hour can rattle your body, and the simple steps that streamline the switch.

As clocks turn back this weekend, sleep specialists caution that our personal body clocks are affected by any alteration in sleep schedules.

It’s a marvel any of us ever learns to tell time. One “day” of 24 hours divided at noon into two 12-hour chunks — why 24 and 12? And each hour consists of 60 minutes with 60 seconds to a minute — why ...

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 ...

In the small hours of Sunday morning, clocks will jump forward one hour from 2 to 3 a.m., starting the inevitable week of missed appointments, analog clock adjustments and other minor confusions that ...

As the clocks go back this weekend, maybe it isn’t just the hour change we need to rethink, writes Dr Catherine Conlon.

WASHINGTON (7News) — It's that time of year when we change the clocks and lose an hour of sleep. Daylight Saving Time occurs at 2 a.m. Sunday, March 12. We will lose an hour of sleep, as the clock ...

Some bodily activities, sleeping, for instance, mostly occur once every 24 hours; they follow a circadian rhythm. Other bodily functions, such as body temperature, cognitive performance and blood ...