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.

Spelling and Capitalization of A.M. and P.M. Their official spelling is with the periods: A.M. and P.M. However, over time, language has evolved, and the spellings am and pm are acceptable when written in a certain way. The event will begin at 11 am. You have soccer practice at 5 pm.

Dec 22, 2023 · Well, a.m. stands for the Latin “ante meridiem” (before midday), while p.m. stands for “post-meridiem” (after midday). Both refer to the sun’s positions in relation to the meridian. What is Military Time? How Does it Work? Now let’s discuss how to write military time.

Chicago Style recognizes two different ways of writing the “a.m.” and “p.m.” abbreviations. This first way is lowercase “a.m.” and “p.m.” The way requires periods and is preferred in Chicago Style. The second way is with small capitals “am” and “pm” This second way can appear with or without periods, making “am” and “a.m.” both acceptable.

May 14, 2020 · AM (ante meridiem) means “before noon,” so it refers to the morning. PM (post meridiem) means “after noon,” so it refers to any time after midday. When using a 12-hour clock, then, these terms clarify the time we have in mind (e.g., 12 AM is midnight, whereas 12 PM is midday). This is not necessary when using a 24-hour clock.

Feb 3, 2021 · Follow these generally accepted guidelines to use a.m. and p.m. (or AM and PM) correctly in formal writing: 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.

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.

10 am and 10:00 am are both incorrect. The abbreviations for “ante meridiem” and “post meridiem” (before noon and after noon) are either AM/PM or a.m./p.m. Hence, 10 a.m. and 10:00 a.m. are correct.

Feb 5, 2021 · In running text, a.m. and p.m. are generally lowercased, with periods after each of the letters. But these abbreviations may also be capitalized —for example, in headings, signs, and notices. At 5:17 a.m. today, all the world’s clocks stopped.

Ante meridiem is commonly denoted as AM, am, a.m., or A.M.; post meridiem is usually abbreviated PM, pm, p.m., or P.M. Like many other sources, timeanddate.com uses “am” and “pm” when using the 12-hour format, but the other variants are equally correct and widely used.