12pm is noon, 12am is midnight. Answer from old-town-guy on reddit.com
NPL
npl.co.uk › resources › q-a › is-midnight-12am-or-12pm
Midnight - is it 12am or 12pm? - NPL
There are no official standards established for the meaning of 12am and 12pm, but it is generally accepted that 12am means midnight and 12pm means midday. The ‘am’ and ‘pm’ stand for ante meridiem and post meridiem – Latin words meaning ...
Reddit
reddit.com › r/nostupidquestions › if 12 am is midnight, why is 12 pm noon? shouldn’t “am” stand for after midnight and “pm” after morning?
r/NoStupidQuestions on Reddit: If 12 AM is midnight, why is 12 PM noon? Shouldn’t “AM” stand for after midnight and “PM” after morning?
May 20, 2025 -
It feels backwards—12 noon is exactly halfway between midnights, but we call it PM. Wouldn’t it make more sense for 12 noon to be AM, since it’s before the second midnight?
Top answer 1 of 5
7
AM stands for "ante meridiem", which means "before midday" and PM stands for "post meridiem", meaning "after midday."
2 of 5
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The abbreviations come from Latin. AM = Ante Meridiem, PM = Post Meridiem. "Meridiem" (meri: middle, diem: day) is noon, and ante/post are before/after respectively. So AM is before noon and PM is after noon. 12-noon exactly is neither before nor after noon, but 12:59 and 12:30 and 12:01 are all after noon, so the "12" hour as a whole is treated as PM. It does look a little weird for the count to go "10am, 11am, 12pm, 1pm" rather than the 12 having the same suffix as the 11 before it. That's an issue with having numbering indexed from one instead of zero. If the clock went "11am 12am, 0pm, 1pm" (with 0:00pm being the moment of noon, and 0:00am midnight) then it would make sense again. But counting from zero is a newer idea.
Videos
00:29
12 AM vs 12 PM – What’s the Difference? - YouTube
🕛 12 AM vs. 12 PM – What’s the Difference? 🔹 12 AM (Midnight) 🌙 – The very start of a new day! When the clock strikes 12 at night, it’s officially AM. 🔹 12 PM (Noon) ☀️ – Midday, when the sun is at its highest. This is when the clock hits 12 in the afternoon. 📌 Tip to Remember: AM = After Midnight (🌙 Night to Morning) PM = Past Morning (☀️ Afternoon & Beyond) Save this post ✅ and never mix them up again! ⏰
#TimeMatters #12AMvs12PM #NeverConfuse https://www.topupEnglish.com/ https://www.ttischool.com/ #TopUpLearning #Walk #online #onlineenglish #english #studyenglish #learnenglish #learnonline #CamdenTown #London #TtiSchool #kidsenglish #kids #topupspirit #leadingthechange #studyinlondon #talk24 #speakingclub | TikTok
00:33
12:00 PM is NOT at night!!! Let's get it right: - YouTube
01:09
12 am or 12 pm?! Noon or Midnight? - YouTube
00:26
AM vs PM Explained | Difference Between 12:00 AM and 12:00 PM in ...
00:53
12 am or 12pm? Learn the difference! How did you do on the quiz?
Royal Museums Greenwich
rmg.co.uk › stories › time › noon-12-am-or-12-pm
Is noon 12 am or 12 pm? | Royal Museums Greenwich
The 12-hour clock divides the 24-hour day into two periods. am stands for the Latin ante meridiem, translating to "before midday". This is the time before noon. pm stands for post meridiem or "after midday" – the time after noon. Noon is therefore neither 'ante' (am) nor 'post' (pm) meridiem. Midnight is also neither am nor pm.
Wikipedia
en.wikipedia.org › wiki › 12-hour_clock
12-hour clock - Wikipedia
3 weeks ago - Although noon could be denoted "12 m.", this is seldom done and also does not resolve the question of how to indicate midnight. By convention, "12 a.m." denotes midnight and "12 p.m." denotes noon. However, many style guides recommend against using either because of the potential for confusion.
EnglishClub
englishclub.com › efl › articles › vocabulary › 12am-12pm-whats-the-difference
12am & 12pm – What’s the Difference?! | EnglishClub
Stop trying to reinvent the wheel. Just say NOON or MIDNIGHT!!! Wars are won and lost because of foolishness like this. ... This is like asking whether zero is positive or negative. When the morning is over, the clock strikes 12 and the afternoon begins, so its 12:00 PM.
Reddit
reddit.com › r/englishlearning › is 12 pm at noon? how is that when 11 am is in the morning and 1 am is in the night. where did the 12 am go?
r/EnglishLearning on Reddit: Is 12 PM at noon? How is that when 11 am is in the morning And 1 am is in the night. Where did the 12 am go?
October 10, 2024 -
I was talking to a native speaker (American woman ) and she corrected me as I was talking to her that 12 PM is the one in the day time not 12 AM. I don’t know if I have had it wrong all my life or what.
TimeAndDate
timeanddate.com › time zones › am and pm
AM and PM: What Do They Mean?
However, most digital clocks and a majority of sources, including timeanddate.com, designate midnight as 12 am and noon as 12 pm. Although the precise moment of noon falls in neither category, the hour succeeding it, from 12:00:01 to 12:59:59, ...
Wikipedia
en.wikipedia.org › wiki › Midnight
Midnight - Wikipedia
3 days ago - The 30th edition of the U.S. Government Style Manual (2008), in sections 9.54 and 12.9b, recommended the use of "12 a.m." for midnight and "12 p.m." for noon. However, the previous 29th edition of the U.S. Government Printing Office Style Manual ...
The Guardian
theguardian.com › notesandqueries › query › 0,,-1752,00.html
Is midnight 12pm or 12am? | Notes and Queries | guardian.co.uk
Skip to main content · EITHER, since it is both 12 hours before and after noon. The real question is: what is mid-day
Quora
quora.com › Is-12-am-midnight-or-noon
Is 12 am = midnight or noon? - Quora
Answer (1 of 4): A2A Neither. Our day is divided into 4 sections (not 2, but 4). The ones we know and love are AM (ante meridian, or before noon), and PM (post meridian, or after noon). The other sections are midnight and noon, two 0-length instants. We usually refer to 12:00:00.000000001 AM a...
Medium
medium.com › @CelineL › is-12-midnight-a-m-or-p-m-44de05ad46e7
Is 12 Midnight A.M. or P.M?. Maybe we need new acronyms for midday… | by Grace Mary Power | Medium
November 24, 2025 - My research has shown that there are no official standards established for the meaning of 12am and 12pm, but it is generally accepted that 12am means midnight and 12pm means midday.
Quora
quora.com › Why-do-we-have-12-00-AM-and-12-00-PM-for-midnight-and-noon-and-what-s-the-correct-way-to-write-them
Why do we have 12:00 AM and 12:00 PM for midnight and noon, and what’s the correct way to write them? - Quora
But even an excellent sundial can’t be precise at the sub-minute level - the Sun is too wide. ... Welcome to the Atlassian Community! Get to know the Atlassian Community and RSVP to any event to earn your Community kudos badge. ... Former Children’s Nurse and Lecturer in Nursing · Author has 6.1K answers and 5.6M answer views · Updated Nov 28 · We DON’T have “12:00 AM” and “12:00 PM” for midnight and noon.
The Editor’s Manual
editorsmanual.com › articles › style › numbers
12 PM or 12 AM for Noon and Midnight? | The Editor’s Manual
July 5, 2022 - Since this is both confusing and ... the words noon and midnight. Using the number 12 with the words noon and midnight is redundant, since noon and midnight cannot be anything but 12 on the clock....
Quora
quora.com › Why-is-12-pm-noon-and-not-midnight
Why is 12 pm noon and not midnight? - Quora
“12” marks the transition between two 12-hour cycles; convention assigns “12:00 pm” to the end of the ante meridiem cycle (noon) and “12:00 am” to the end of the post meridiem cycle (midnight).
Quora
quora.com › Is-midnight-12-AM-or-0-AM
Is midnight 12 AM or 0 AM? - Quora
... For schedules, legal documents, or timestamps that must be unambiguous, use the 24-hour format (00:00) or add a date: “2025-08-31 00:00” or “midnight at the start of Aug 31.” · If you must use 12-hour notation, write “12:00 AM” and, ...
Quora
quora.com › If-12-a-m-is-midnight-then-at-what-time-is-full-night
If 12 a.m. is midnight, then at what time is full night? - Quora
So, the current night is progressing as it is going to be midnight after about 2 hours from now. The night will be completed around 5.31 AM and then day will start, although Islamic date started after 5.06 PM.
Quora
quora.com › What-is-12-am-and-12-pm
What is 12 am and 12 pm.? - Quora
It's either 12 noon or 12 midnight. These times are neither am nor pm. ... To me, it is very clear that 12 am is midnight, and 12 pm is noon. 12 am is the instant the day changes.
Reddit
reddit.com › r/explainlikeimfive › eli5: why is midday usually represented as 12pm rather than 12am?
r/explainlikeimfive on Reddit: ELI5: Why is midday usually represented as 12pm rather than 12am?
January 3, 2026 - By convention, 12:00 noon was grouped with PM, so the hours after it are: 12 PM → 1 PM → 2 PM → etc. Similarly, 12:00 AM is grouped with the night side, starting the midnight hour: 12 AM → 1 AM → 2 AM → etc.
WordReference
forum.wordreference.com › english only › english only
12am / 12pm - Which is noon? which is midnight? | WordReference Forums
June 27, 2012 - Strictly speaking, neither 'am' nor 'pm' applies to exact noon, or to exact midnight, but clocks incapable of displaying "noon" or "midnight" had to show something. In writing and printing, it would still be best to use "noon" or "midnight" ...