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AM vs. PM: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Published on February 14, 2024
AM (Ante Meridiem) refers to the time from midnight to noon, while PM (Post Meridiem) indicates the time from noon to midnight in a 12-hour clock system.
AM vs. PM

Key Differences

AM, standing for Ante Meridiem, represents the time from midnight (00:00) to just before noon (11:59). PM, or Post Meridiem, denotes the time from noon (12:00) until just before midnight (23:59). Both are used to differentiate hours in a day.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024
In the 12-hour clock system, AM signifies morning hours, a time typically associated with starting daily activities. PM, on the other hand, covers the afternoon and evening hours, often associated with the latter part of daily routines.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024
When scheduling events, AM is used to indicate times before noon. For example, a meeting set for 10:00 AM occurs in the morning. Conversely, PM is used for events after 12:00 noon, like a dinner at 7:00 PM.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024
The use of AM and PM avoids confusion in the 12-hour clock by clearly dividing the day into two halves. Each half consists of 12 hours, making time-telling more straightforward for everyday activities.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024
AM times are generally quieter and cooler, considered suitable for activities like exercise or study. PM times, especially evenings, are often reserved for social activities, relaxation, or entertainment.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024
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Comparison Chart

Time Range

Midnight to noon (00:00 – 11:59)
Noon to midnight (12:00 – 23:59)
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Shumaila Saeed
Feb 14, 2024

Typical Activities

Morning routines, exercise, work
Afternoon tasks, social events, rest
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Shumaila Saeed
Feb 14, 2024

Sun Position

Rising to highest point
Descending to setting
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Shumaila Saeed
Feb 14, 2024

Social Context

Often quieter, less busy
More social, active period
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Shumaila Saeed
Feb 14, 2024

Temperature

Generally cooler
Typically warmer
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Shumaila Saeed
Feb 14, 2024
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AM and PM Definitions

AM

Used to denote morning hours.
I usually have breakfast at 8:00 AM.
Shumaila Saeed
Shumaila Saeed
Jan 19, 2024

PM

Used to denote afternoon and evening hours.
Dinner is served at 6:00 PM.
Shumaila Saeed
Shumaila Saeed
Jan 19, 2024

AM

Time period from midnight to just before noon.
The flight is scheduled to depart at 9:00 AM.
Shumaila Saeed
Shumaila Saeed
Jan 19, 2024

PM

Time period from noon to just before midnight.
The movie starts at 8:00 PM.
Shumaila Saeed
Shumaila Saeed
Jan 19, 2024

AM

Indicates the first half of the day in a 12-hour clock.
My appointment is at 11:00 AM.
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Shumaila Saeed
Jan 19, 2024
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PM

Indicates the second half of the day in a 12-hour clock.
Our meeting is scheduled for 3:00 PM.
Shumaila Saeed
Shumaila Saeed
Jan 19, 2024

AM

Often associated with the start of daily activities.
The store opens at 7:00 AM.
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Shumaila Saeed
Jan 19, 2024

PM

Often associated with the latter part of the day's activities.
The show airs at 10:00 PM.
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Shumaila Saeed
Jan 19, 2024

AM

First person singular present indicative of be.
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Shumaila Saeed
Jan 17, 2024

PM

Post Meridiem, Latin for "after midday."
The concert begins at 9:00 PM.
Shumaila Saeed
Shumaila Saeed
Jan 19, 2024

AM

Inflection of be
Shumaila Saeed
Shumaila Saeed
Jan 17, 2024

PM

Alternative form of p.m.
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Shumaila Saeed
Jan 17, 2024

AM

The first person singular of the verb be, in the indicative mode, present tense. See Be.
God said unto Moses, I am that am.
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Shumaila Saeed
Jan 17, 2024

PM

An examination and dissection of a dead body to determine cause of death or the changes produced by disease
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Shumaila Saeed
Jan 17, 2024

AM

A radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms
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Shumaila Saeed
Jan 17, 2024

PM

A soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
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Shumaila Saeed
Jan 17, 2024

AM

A master's degree in arts and sciences
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Jan 17, 2024

PM

The person who holds the position of head of state in England
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Shumaila Saeed
Jan 17, 2024

AM

Modulation of the amplitude of the (radio) carrier wave
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Shumaila Saeed
Jan 17, 2024

PM

Modulation of the phase of the carrier wave
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Shumaila Saeed
Jan 17, 2024

AM

Ante Meridiem, Latin for "before midday."
The seminar starts at 10:00 AM.
Shumaila Saeed
Shumaila Saeed
Jan 19, 2024

PM

After noon
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Shumaila Saeed
Jan 17, 2024

PM

Between noon and midnight;
Let's meet at 8 P.M.
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Shumaila Saeed
Jan 17, 2024

Repeatedly Asked Queries

Can 12:00 be both AM and PM?

Yes, 12:00 AM is midnight, and 12:00 PM is noon.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Does AM refer to morning times?

Yes, AM refers to the time from midnight to just before noon.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

What does PM stand for?

PM stands for Post Meridiem, Latin for "after midday."
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Is PM used for evening times?

Yes, PM is used for times from noon to midnight, covering afternoons and evenings.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

What does AM stand for?

AM stands for Ante Meridiem, Latin for "before midday."
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Is 11:59 the last minute of AM?

Yes, 11:59 AM is the last minute before noon.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Are AM times typically cooler?

Generally, yes, since they include early morning hours.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Are PM times more socially active?

Often, yes, especially during evenings.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Would 8:00 PM be considered night?

Yes, it's considered evening or night time.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Why do we use AM and PM?

They help differentiate times in the 12-hour clock system.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Does 12:01 belong to PM?

Yes, 12:01 PM is just after noon.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Is 9:00 AM considered early morning?

Yes, it's in the mid-morning period.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Is a time like 3:00 always AM or PM?

It must be specified as either 3:00 AM or 3:00 PM.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Is noon exactly 12:00 PM?

Yes, noon is precisely 12:00 PM.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Is midnight exactly 12:00 AM?

Yes, midnight is precisely 12:00 AM.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Are PM times associated with winding down activities?

Typically, yes, especially in the late PM hours.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Do AM times indicate the start of a new day?

Yes, a new day starts at 12:00 AM.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Do digital clocks display AM and PM?

Yes, most 12-hour format digital clocks display AM or PM.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Are business hours usually in AM or PM?

They typically start in AM and can extend into PM.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

Can AM and PM be used in military time?

No, military time uses a 24-hour format without AM or PM.
Shumaila Saeed
Shumaila Saeed
Feb 14, 2024

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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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