Midnight is 12 midnight and mid-day is 12 noon. All other usage is sloppy. As one reply says the armed forces use and George Redgrave, Crawley United Kingdom The disagreement about midnight stems from the fact that it is a boundary between two days. There is no reason to prefere one over the other except a desite for standardisation. Following this, it is obvious that this same moment in time can also be called 12pm Monday because it is 12 hours after the Monday meridian or 12am Tuesday because it is 12 hours before the Tuesday meridian.
The very fact that both of these positions can be defended is reason to never use either. Similarly, noon is the meridian and is therefor neither am nor pm. We only call it 12 o'clock because of the number on the dial. There is no logical reason why this number cannot be replaced with a zero.
It is simply noon. Since we do not notate time backwards, 12 midnight is not 12 am, since it would then require 1 am to become 11 am and so on. Similarly since it is the fleeting instant that marks both the end of one day and the beginning of the next it belongs to both days and to neither ,it is not 12 pm. In reality midnight has no sooner been reached than it has been passed. The phrase "the stroke of midnight" is apt.
As has been demonstrated by many of the previous answers, and because it is incorrect, the use of 12 am and 12 pm is inherently confusing. To avoid this confusion it should be ended. The use of noon and midnight informally or 12 noon and 12 midnight or and should become practice. Bernard Maguire, Glasgow Scotland I have had fun reading all these answers. However, I have always held the fact that 12pm is noon.
Example: Counting in minutes, you would have am, am, am, am etc. Therefore it stands to reason you would have: am, am, pm, pm. It would just be odd to have: am, am, am, pm John Wood, Sheffield, England Use 12 midday or 12 midnight for clarity. It is easy to call others morons. We need to realize that a clock gives us a means of reading time. Time is a fluid, always changing value. It is never what the clock says it is. Noon and midnight are for a infinitely small period of time as is any number on the clock represents.
An example is the only clock that is correct is the one that is stopped. It gives the correct time twice a day. A running clock is always wrong. By the time we look at a clock that tells us it is noon, it is past noon and the same at midnight. So where does that leave us? When the time reaches noon, it is PM. When the time reaches midnight, it is AM. They sleep at night. What time is it? When I was a lad s , my teachers made it all very clear. Our 12 hour clock convention splits the day into two 12 hour periods called am followed by pm.
This follows the 24 hour clock convention split into am and pm and means midnight is always the end of a day. Both digital and analogue timepieces indicate precisely that convention, any time between the 12 and 1 on the timepiece is less than 1 approaching 1.
We say 12 at midday or midnight as a continuation of the sequence from 1 up to 11, and 12 comes after Hence, if we refer to the mornings and say 1 am to 11 am, then 12 must follow as 12 am midday ; and, if we refer to the afternoons and nights and say 1 pm to 11 pm, then 12 must follow as 12 pm midnight. Think of it as simple counting. Thank you for all your comments. It is indeed a complicated question.
Because 12 is the top of the hour, so 12 midnight marks the beginning of a new day. Midnight is when it changes back. Noon is 12pm, midnight is 12am. Midnight is the transition time from one day to the next — the moment when the date changes, on the local official clock time for any particular jurisdiction.
By clock time, midnight is the opposite of noon, differing from it by 12 hours. Because of the potential for confusion, it is advisable to use 12 noon and 12 midnight. Whoever was in charge of deciding these things decided on the current system and everyone has stuck with it since. AM means ante meridiem and Pm means post meridiem, or before and after midday. The reason for the separation is that all the minutes of the hour PM are after midday.
Marking the start of British Summer Time, the clocks 'spring forward' in March, meaning we'll lose an hour's sleep When do the clocks go back in ? Marking the end of British Summer Time, the clocks go back in October, giving us an extra hour in bed Discover gifts from the home of time Learn the story of Greenwich Mean Time.
Keep track of time with Royal Observatory Greenwich watches, and our famous Shepherd Gate clock replica for your wall. Time to spare? Learn more about time and space with the Royal Observatory Greenwich.
How did local clock time in Greenwich change the world? Marking the start of British Summer Time, the clocks 'spring forward' in March, meaning we'll lose an hour's sleep. When do the clocks go back in ? Marking the end of British Summer Time, the clocks go back in October, giving us an extra hour in bed.
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