| M|Y |
X |
W |
V |
U |
T |
S |
R |
Q |
P |
O |
N |
Z |
A |
B |
C |
D |
E |
F |
G |
H |
I |
K |
L |
M|Y |
AM* and PM* Abbreviation(s), Latin phrase, Meaning
|
ABBREVIATION(S) |
LATIN PHRASE |
MEANING |
AM
A.M.
am
a.m. |
Ante Meridiem Ante Meridian
Latin = "before midday"
|
before noon |
PM
P.M.
pm
p.m. |
Post Meridiem Post Meridian
Latin = "after midday"
|
after noon
Afternoon |
* |
Terms 12 a.m. and 12 p.m. cause confusion and should not be used
as neither the "12 am" nor the "12 pm" designation is technically correct.
It advisable to use 12 noon and 12 midnight where clarity is required.
To avoid ambiguity, airlines, railroads, and insurance companies use 12:01am for an event beginning the day, 11:59pm for ending it.
|
|
Converting from AM / PM to 24 hour clock
|
12 midnight to 12:59 AM |
1:00 AM to 12:59 PM
|
1:00 PM to 11:59 PM |
subtract 12 hours |
straight conversion
|
add 12 hours: |
EXAMPLES:
12 midnight --> 0000
12:13 AM --> 0013
12:59 AM --> 0059
|
EXAMPLES:
01:00 AM --> 0100
08:00 AM --> 0800
11:59 AM --> 1159
12 noon --> 1200
12:01 PM --> 1201
12:45 PM --> 1245
12:59 PM --> 1259
|
EXAMPLES:
01:00 PM --> 1300
03:30 PM --> 1530
06:00 PM --> 1800
09:00 PM --> 2100
10:30 PM --> 2230
11:05 PM --> 2305
11:59 PM --> 2359
|
| Converting from 24 hour clock to AM / PM
|
0000 to 0059 |
0100 to 1159
|
1200 to 1259 |
1300 to 2359 |
add 12 hours |
straight conversion to AM
|
straight conversion to PM |
subtract 12 hours |
EXAMPLES:
0000 --> 12 midnight
0015 --> 12:15 AM
0030 --> 12:30 AM
0059 --> 12:59 AM
|
EXAMPLES:
0100 --> 01:00 AM
0300 --> 03:00 AM
0700 --> 07:00 AM
0830 --> 08:30 AM
1000 --> 10:00 AM
1159 --> 11:59 AM
|
EXAMPLES:
1200 --> 12 noon
1215 --> 12:15 PM
1230 --> 12:30 PM
1259 --> 12:59 PM
|
EXAMPLES:
1300 --> 01:00 PM
1500 --> 03:00 PM
1800 --> 06:00 PM
2030 --> 08:30 PM
2215 --> 10:15 PM
2359 --> 11:59 PM
|
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