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Simply enter the 12-hour time value into the box on the left and select between ante meridiem (am) or post meridiem (pm) options. Hit the 'Convert' button. To convert 12 hour time to 24 hour time format we follow the steps below: If the time is between 12:00 AM and 12:59 AM, we subtract 12 hours.
- Time of Day
- Numerals vs. Words For Time
- A.M. and P.M.
- O’Clock
- Quarter, Half, Whole Hours
- 12-Hour vs. 24-Hour System
- 24-Hour Clock
- Space After Numerals For Time
- Time Zones
- Time Periods and Duration
Time can be written using either the 12-hour or 24-hour system. The abbreviation a.m. or p.m., the word hours, or the term o’clockis generally used after the number denoting the time. In informal communication, just the number is often sufficient to express time. Various style manualssuggest different ways to write the time. Discussed in this artic...
Use numerals with a.m. and p.m.to emphasize exact time on the clock face. Also use numerals to specify time using the 24-hour system. When the exact time is not important, time is generally expressed in words instead of numerals. This is common in creative and informal writing. To express time in quarter, half, or whole hours, without the abbreviat...
Use a.m. and p.m. with numerals to refer to exact time. Note that the abbreviations a.m. (from the Latin ante meridiem, or “before midday”) and p.m. (post meridiem or “after midday”) are most often written as such: in lower case with periodsbetween the letters. When capitalized, small capital letters (or small caps) are generally used, although thi...
The term o’clock, which means “of the clock,” may be used when the exact time is unimportant. Such usage is common and often preferred in everyday speech, creative writing, and informal communication. There is no space between the apostropheand the word “clock.” Either numerals or words may be used with o’clock. Style guides differ in their recomme...
In speech and informal writing, time is often expressed in quarter, half, and whole hours. With whole hours, the term o’clock may or may not be used. Also, since a.m. and p.m.are not used, time expressions like “in the morning” or “at night” are appropriate.
Many countries express time using the 24-hour system instead of the 12-hour system. The 24-hour system is also used when confusion between a.m. and p.m.could result in dangerous or costly mistakes—for example, in military settings, hospitals, research labs, airports, and train and bus stations.
In general, to write time in the 24-hour system, omit the colonbetween hours and minutes, and follow the numerals for time with the word “hours.” A colon is used when the word “hours” is omitted.
Regardless of whether you use a.m./p.m., o’clock, or hours, always use a space after the numerals used to denote the time.
Specify time zonesonly when necessary. Periods are not used with abbreviations for time zones. When spelling a time zone out, you may either capitalize or lowercase the words. The Chicago Manual of Style suggests using lowercase letters; the AP Stylebook suggests capitalization. Always capitalize proper nouns and proper adjectives(names of places o...
You may use either words or numerals to speak of a duration or a time period. In general, use words for numbers until nine and numerals from 10 onward. In Chicago style, use words for two-digit numbers as well. Hyphenatetwo-digit numbers.
The 24-hour clock is a way of telling the time in which the day runs from midnight to midnight and is divided into 24 hours, numbered from 1 or 0 to 24 or 23. It does not use a.m. or p.m.
PM = Post meridiem: After noon. Using numbers from 1 to 12, followed by am or pm, the 12-hour clock system identifies all 24 hours of the day. For example, 5 am is early in the morning, and 5 pm is late in the afternoon; 1 am is one hour after midnight, while 11 pm is one hour before midnight.
Jan 23, 2020 · For times between 1:00 PM to 11:59 PM, add 12 hours: 3:17 PM = 15:17; 11:59 PM = 23:59; Converting from a 24 Hour to a 12 Hour Clock. Starting from the first hour of the day (0:00 / midnight to 0:59), add 12 hours and AM to the time: 0:30 = 12:30 AM; 0:55 = 12:55 AM; From 1:00 to 11:59, simply add AM to the time: 2:25 = 2:25 AM; 9:30 = 9:30 AM ...
A 24-hour clock is a way of keeping time that divides a day into 24 hours starting from midnight and ending at midnight. It is the most common way in which time is kept around the world today. The 24-hour clock is also sometimes referred to as military time.
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Mar 2, 2024 · The 24 Hour Clock Converter operates on a simple premise: each day is divided into 24 hours, beginning at midnight (00:00) and ending at midnight (24:00). Time is expressed in four-digit format, with the first two digits representing hours and the last two digits representing minutes.
