Minutes and seconds, however, were not used for everyday timekeeping until many centuries after the Almagest. Clock displays divided the hour into halves, thirds, quarters and sometimes even 12 ...

For example, click "1:30:55 PM" to format the text as H:MM:SS -- where H represents hours, M represents minutes and S represents seconds. Alternatively, you can select "13:30:55" to use the 24 ...

It's also why people eventually decided to break up the face of a clock, which is also a circle, into 60 minutes … and then to break down each minute into 60 seconds. It took a long time before ...