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Time for Math Poster

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By Brigitte Bentele, Ron Lancaster


TIME for MATH
24-HOUR CIRCULAR CLOCKS are divided into 24 hours and display the time since midnight, which is when the day begins. Time is always written with four digits—00:00—but can be noted either with or without the colon. For example, 03:14 or 0314 represents the time of 3 hours and 14 minutes after midnight. One advantage of the 24-hour clock over the 12-hour clock is that there is no ambiguity about the actual time, which can be crucial in medicine and the military. On a 12-hour clock, 6:28 could refer to morning or evening, whereas 18:28 on a 24-hour clock is clearly in the evening. Of course, this is why we use AM and PM when writing times for a 12-hour clock.
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