One way to remember the difference between A.M. and P.M. is by thinking of the word “ante” (A) as meaning “before” and “post” (P) as meaning “after.” So, A.M. is before noon and P.M. is after noon. Another way to remember is that the alphabet begins with the letter “A,” and the morning is the first part of the day.

Do I Capitalize AM and PM? When emphasizing an exact or precise time, the abbreviations “a.m.” and “p.m.” are used. These two abbreviations stand for the Latin terms “ante meridiem” and “post meridiem,” which literally mean before noon and after noon.

Instead of AM and PM (in small caps), p.m. and a.m. -- with lowercase and periods -- are the preferred way to indicate time of day. According to the The Chicago Manual Style used by journalists.

2021年2月3日 · Use the abbreviations a.m. and p.m. to indicate exact time. Use a.m. to refer to a time of day before noon, and p.m. to speak of a time between noon and midnight. Use numerals or figures instead of words to denote time with a.m. and p.m. (eleven / 8 a.m.) in formal texts.

2019年10月3日 · What does a.m. mean? The term we associate with the morning, a.m., is an abbreviation of the Latin phrase ante merīdiem meaning “before midday.” What does p.m. mean? P.m. is an abbreviation of post merīdiem, meaning—you guessed it—“after midday.” These two terms help keep ambiguity at bay in the 12-hour time system. What does m. mean?

P.M.翻译：下午, 首相（prime minister的缩写）, 项目经理（project manager 的缩写）, 私信（private message的缩写）, 发私信（private…。了解更多。

P.M. meaning: 1. used when referring to a time in the afternoon or evening or at night: 2. abbreviation for…. Learn more.

2021年8月11日 · PM stands for “post meridiem,” meaning “after noon” or “after midday,” and as such applies to the times from noon onward. English-speaking countries have been using the “AM” and ...

2016年5月16日 · “AM” stands for the Latin phrase Ante Meridiem —which means “before noon”—and “PM” stands for Post Meridiem : “after noon.” Although digital clocks routinely label noon “12:00 PM” you should avoid this expression not only because it is incorrect, but because many people will imagine you are talking about midnight instead.

2023年12月22日 · What do a.m. and p.m. stand for? What is Military Time? How Does it Work? Who uses the 24-hour clock format? Let’s discuss the proper way to write time, whether standard, military time or the 24-hour clock. To start, let’s discuss standard 12-hour clock that uses a.m. and p.m. Two commonly seen formats are 4pm and 4:00pm. Which is correct?