Many people have heard of the circadian rhythms or biological processes that follow a 24-hour cycle. Sleeping at night and being awake during the day is a well-known example of a circadian rhythm.

We always enjoy unique clocks, and a recent 3D print from [David Kingsman] caught our eye. It converts an Ikea clock into a very unusual-looking “wandering hour” clock that uses a Geneva drive to show ...

Military time, also known as the 24-hour clock, is a system the military uses to eliminate confusion between morning and afternoon hours, since the armed forces are in operation around the clock. In ...

Researchers led by Bert O’Malley of Baylor College of Medicine in Houston, Texas, identified a set of metabolism and stress genes in mouse liver cells that followed a pattern of expression on a ...

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 ...

The Material Design team has an interesting blog post into what it calls the “24-hour Clock Design Challenge” that chronicles Google’s work creating a time picker for those that use a 24-hour format ...

Although Windows 11/10 shows a 24-hour lock format on the lock screen, you can change it to a 12-hour format using this step-by-step tutorial. It is possible to change the lock screen clock format on ...