In certain countries, 24-hour time is referred to as military time, since this is the time format used by militaries (and other entities) around the world, where unambiguous time measurement is particularly important. The hours from 0-11 denote what would be the AM hours on a 12-hour clock, while hours 12-23 denote the PM hours of a 12-hour clock. This time format is an international standard, and is often used to avoid the ambiguity resulting from the use of a 12-hour clock. Using the terms '12 midnight' and '12 noon' can remove ambiguity in cases where a person may not be accustomed to conventions.Ī 24-hour clock typically uses the numbers 0-23, where 00:00 indicates midnight, and a day runs from midnight to midnight over the course of 24 hours. On digital clocks and watches, 'AM' stands for ante meridiem, meaning 'before midday,' while 'PM' stands for post meridiem, or 'after noon.' By convention, 12 AM denotes midnight, while 12 PM denotes noon.

Depending on the clock being used, most analog clocks or watches may not include an indication of whether the time is in the morning or evening. You just need to set the time and press the Start button, now be sure that 123Timer will notify you with an accuracy of milliseconds. Most people read time using either a 12-hour clock or a 24-hour clock.Ī 12-hour clock uses the numbers 1-12. Our countdown timer will be useful in many cases: for example, if you like to play online games and you need to track time, as well as during sports activities, cooking, and many other cases. Try the Fullscreen button in classrooms and meetings :-) Start. Related Time Card Calculator | Time CalculatorĪn hour is most commonly defined as a period of time equal to 60 minutes, where a minute is equal to 60 seconds, and a second has a rigorous scientific definition. A cool little 10 Minutes Timer Simple to use, no settings, just click start for a countdown timer of 10 Minutes.

10 min timer for 3 hours