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We all know that the models of time and their relationships. Now, we’ll be taught to learn a railway schedule and a calendar.
Allow us to revise:
60 seconds = 1 minute
60 minutes = 1 hour
24 hours = 1 day
7 days = 1 week
52 weeks + 1 day = 1 12 months = three hundred and sixty five days
52 weeks + 2 days = 1 intercalary year = three hundred and sixty six days
10 years = 1 decade
100 years = 1 century
A 12 months is split into 12 months.
Month January February March April Could June July August September October November December 
No. of days 31 28 31 30 31 30 31 31 30 31 30 31 
Observe: In a intercalary year February has 29 days.
Place of Hour Hand 
Place of Minute Hand 
Place of Time 

Between 2 and three 
At mark 38 
2:38 (2 Hours 38 Minutes) 

Between 2 and three 
At mark 52 
2:52 (2 Hours 52 Minutes) 

Between 2 and three 
At mark 23 
2:23 (2 Hours 23 Minutes) 
The 24hour Clock Time:
In our day by day life we use a 12hour clock. However some departments like Railways, Airways and Armed forces use 24hour clock. Digital watches additionally present time in 24hour clock time.
Have a look at these clock.
We will see each the clocks are displaying the identical time However the best hand digital clock 22:30 tells us that it’s 10:30 within the evening as a result of it expresses 24hour clock time. 24hour clock typically used at airports and railway stations to point out flight or practice timings. It clarifies the confusion of whether or not it’s day or evening.
In a 24hour clock, every new day begins at midnight. In an analogue clock (12hour clock), the identical time is proven twice a day and we use a.m. or p.m. to inform what a part of the day it’s.
12hour clock time 24
hour clock time
12midnight 2400
hours or 0000 hours
1 a.m. 0100
hours
1:30 a.m. 0130 hours
4:50 a.m. 0450
hours
11.10 a.m. 1110
hours
12 midday 1200
hours
12:30 p.m. 1230
hours
1:00 p.m. 1300
hours
11:30 p.m. 2330
hours
Within the 24hour clock, the time from midnight to midnight is 1 day (24 hours)
Zero hours or 24 hours = midnight
12 hours = noon = midday 12 hours = 1200 hours
2 p.m. = 1400 hours and so forth 1 p.m. = 1300 hours
Guidelines for Changing 24 Hour to 12Hour or Customary Time
1. The numeral shaped by the 2 digits from the best denotes the variety of minutes.
2. If the numeral shaped by the primary two digits from the left is lower than 12, it denotes the variety of hours earlier than midday and so a.m. is for use with it.
i.e., Use a.m. if the variety of hours is lower than 12.
For instance:
(i) 0845 hours 08:45 a.m.
(ii) 0500 hours 05:00 a.m., or, 5 a.m.
(iii) 1145 hours 11 hrs. 45 min. a.m. or, 11:45 a.m.
(iv) 1020 hours 10:20 a.m.
3. If the numeral shaped by the primary two digits from the left is bigger than 12, the distinction between the quantity and 12 offers the variety of hours after midday and so p.m. is for use with it.
i.e., Use p.m. if the variety of hours is greater than 12.
For instance:
(i) 1345 hours 01:45 p.m. (13 – 12 = 1)
(ii) 2050 hours 08:50 p.m. (20 – 12 = 8)
(iii) 1300 hours 1:00 p.m. (13 – 12 = 1)
(iv) 1845 hours 6.45 p.m. (18 – 12 = 6)
● If the variety of hours is 12 and minutes is greater than 00, then it’s previous midday.
For instance:
(i) 1220 hours 12:20 p.m.
(ii) 1234 hours 12:34 p.m.
We usually use 12hour clock system. The hour hand of the clock goes around the dial twice a day (24 hours). Some departments like railways, Airways, and so forth use 24hour clock system as a result of they don’t use a.m. and p.m. occasions.
In a 24hour clock system, we categorical time in 4 digits. The primary two digits signify hours and the final two digits signify the minutes.
On the dial there are two
concentric circles. The inside circle has 1 to 12 numbers whereas the outer
circle has 13 to 24 numbers.
In a 24hour clock system, we begin counting the time from midnight. Allow us to perceive 24hour system by contemplating some examples.
(i) 12 midnight is denoted by 24 00 hours or 00 00 hour.
(ii) 12 midday is denoted by 12 00 hours.
(iii) 6 within the morning is denoted by 06 00 hours.
(iv) 10:25 within the night is denoted by 22 25 hours.
(10:25 + 12:00)
(v) 7:15 within the night is denoted by 19 15 hours.
(7:15 + 12:00)
From the above examples, we are able to conclude that between 12 midnight and 12 midday the 24hour clock time is similar.
For instance, 10 40 hours = 10:40 a.m., 08 20 hours = 8:20 a.m., 11 30 hours = 11:30 a.m.
However between 12 midday and 12 midnight to transform the 24hour clock time into 12hour clock time, we subtract 12 from the 24hour time.
For instance, 19:30 hours = 19:30 – 12:00 = 7:30 p.m.
Equally, to transform the 12hour clock time into 24hour clock time between 12 midday and 12 midnight, we add 12.
For instance, 11:30 p.m. = 11:30 + 12:00 = 23:30 hours.
Due to this fact, the time which is proven by the inside circle is the time earlier than midday and that proven by the outer circle is the time after midday.
These are some extra examples:
After midnight 00:10 a.m. is proven as 00:10
02:45 a.m. is proven as 02:45
10:48 a.m. is proven as 10:48
02:45 p.m. is proven as 14:45
10:48 p.m. is proven as 22:48
Clock Normal Time 24 hour clock
00:00 midnight (Simply after midnight) or, 12:00 midnight 06:00 a.m.(6 hours zero minutes within the morning) 12:00 midday 
00:00 (Simply after midnight) or, 24:00 hours 06:00 12:00 
We all know how you can use a.m. and p.m. to signify the time of the day in 12hour clock. We all know {that a}.m. is used to specific time between 12 o’clock mid evening to 12 o’clock midday and p.m. is used to specific time between 12 o’clock midday to 12 o’clock midnight.
In 24hour clock time, we categorical time in 4 digits. The primary two digits from left represt hours and the final two digits signify the minutes.
So, to specific time for a.m., we simply write the time with out separating hours and minutes.
For instance 7:45 am is written as 0745 hours.
To precise time for p.m. we add 12 to the hours after which write hours and minutes with out separating them. For instance 6:30 p.m. is written as (6 + 12), 1830 hours.
24Hour Clock Time Format:
The hour hand of the clock goes around the clock twice a day meaning 24 hours. 24hour clock time doesn’t have a.m. or p.m. In 24hour clock system, we categorical time in 4 digits. The primary two digits signify hours and the final two digits signify the minutes. There are not any dots to separate hours and minutes. The time begins at 0000 hours or 2400 hours which is 12 midnight.
24Hour Clock Time Chart
Click on right here to obtain the 24Hour Clock Time Chart.
In a 24hour clock system, we begin counting the time from midnight. Allow us to perceive 24hour system by contemplating some examples.
1. Changing 12Hour Clock to 24Hour Clock Time Format:
12Hour Time to 24Hour Time Conversion Desk
12Hour Clock Time 
24Hour Clock Time 
12 midnight 
0000 hours or 2400 hours 
1 a.m. 
0100 hours 
2 a.m. 
0200 hours 
3 a.m. 
0300 hours 
4 a.m. 
0400 hours 
5 a.m. 
0500 hours 
6 a.m. 
0600 hours 
7 a.m. 
0700 hours 
8 a.m. 
0800 hours 
9 a.m. 
0900 hours 
10 a.m. 
1000 hours 
11 a.m. 
1100 hours 
12 midday 
1200 hours 
1 p.m. 
1300 hours 
2 p.m. 
1400 hours 
3 p.m. 
1500 hours 
4 p.m. 
1600 hours 
5 p.m. 
1700 hours 
6 p.m. 
1800 hours 
7 p.m. 
1900 hours 
8 p.m. 
2000 hours 
9 p.m. 
2100 hours 
10 p.m. 
2200 hours 
11 p.m. 
2300 hours 
I. For the primary hour of the day (12 Midnight to 12:59 a.m.), subtract 12 hours
For instance:
(i) 12 Midnight = 0000 hours
(ii) 12:05 a.m. = 0005 hours
(iii) 12:40 a.m. = 0040 hours
II. From 1:00 a.m. to 12:59 p.m., no change.
For instance:
(i) 6:40 a.m. = 0640 hours
(ii) 12:30 p.m. = 1230 hours
(iii) 10:45 a.m. = 1045 hours
III. From 1:00 p.m. to 11:59 p.m., add 12 hours
(i) 3:45 p.m. = 1545 hours (3:45 + 12)
(ii) 6:20 p.m. = 1820 hours (6:20 + 12)
(iii) 08:55 p.m. = 2055 hours (8:55 + 12)
2. Changing 24Hour Clock to a.m. or p.m.
I. For the primary hour of the day (0000
to 0059), add 12 hours to make it a.m.
For instance:
(i) 0001 hours = 12:01 a.m.
(ii) 0048 hours = 12:48 a.m.
II. From 0100 hours to 1159 hours,
simply add a.m. after the hours.
For instance:
(i) 0225 hours = 2:25 a.m.
(ii) 1150 hours = 11:50 a.m.
III. From 1200 hours to 12 hours 59, simply add p.m. after the
hours.
For instance:
(i) 1235 hours = 12:35 p.m.
(ii) 1205 hours = 12:05 p.m.
IV. From 1300 hours to 23 hours 59, subtract 12 hours to make it
p.m.
For instance:
(i) 1355 hours = 1:55 p.m.
(ii) 1725 hours = 5:25 p.m.
Questions and Solutions on 24 Hour Clock Time Format:
I. Convert the time given in a.m. and p.m. type into the
24hour type. One is proven for instance.
(i) 1 : 24 p.m.
1 : 24 p.m. = 1 : 24 + 12 : 00
=
13 : 24
1 : 24 p.m. = 1324 hours
(ii) 7 : 16 a.m.
(iii) 4 : 55 a.m.
(iv) 6 : 54 p.m.
(v) 9 : 33 p.m.
(vi) 11 : 42 p.m.
Solutions:
I. (ii) 0716 hours
(iii) 0455 hours
(iv) 1854 hours
(v) 2133 hours
(vi) 2342 hours
II. Convert the time given in 24 hour type right into a.m./p.m.
type. One is proven for instance.
(i) 1341 hours
1341 = 1341 – 1200
= 1 : 41 p.m.
1341 = 1 : 41 p.m.
(ii) 2325 hours
(iii) 1750 hours
(iv) 0853 hours
(v) 0432 hours
(vi) 1539 hours
Solutions:
II. (ii) 11 : 25 p.m.
(iii) 05 : 50 p.m.
(iv) 08 : 53 a.m.
(v) 04 : 32 a.m.
(vi) 03 : 39 p.m.
III. Convert the next 12hour clock time to 24hour clock time.
(i) 7:15 p.m.
(ii) 6:45 a.m.
(iii) 12:15 p.m.
(iv) 2:50 a.m.
(v) 10:10 p.m.
(vi) 6:30 p.m.
Reply:
III. (i) 1915 hours
(ii) 0645 hours
(iii) 1215 hours
(iv) 0250 hours
(v) 2210 hours
(vi) 1830 hours
IV. Change to 24 hour clock time:
(i) 4:15 a.m.
(ii) 6:30 p.m.
(iii) 12:45 p.m.
(iv) 1:20 a.m.
(v) 9:30 a.m.
(vi) 10:25 p.m.
Reply:
IV. (i) 0415 hours
(ii) 1830 hours
(iii) 1245 hours
(iv) 0120 hours
(v) 0930 hours
(vi) 2225 hours
V. Convert the next 24hour clock time to 12hour clock time.
(i) 1345 hours
(ii) 0330 hours
(iii) 2035 hours
(iv) 0515 hours
(v) 1655 hours
(vi) 1945 hours
Reply:
V. (i) 1:45 p.m.
(ii) 3:30 a.m.
(iii) 8:35 p.m.
(iv) 5:15 a.m.
(v) 4:55 p.m.
(vi) 7:45 p.m.
VI. Change to 12 hour clock time:
(i) 1700 hours
(ii) 1535 hours
(iii) 0030 hours
(iv) 2000 hours
(v) 2215 hours
(vi) 2300 hours
Reply:
VI. (i) 5:00 p.m.
(ii) 3:35 p.m.
(iii) 12:30 a.m.
(iv) 8:00 p.m.
(v) 10:15 p.m.
(vi) 11 p.m.
VII. Write the proper 24hour clock time with every analog clock.
Solutions:
VII. (i) 1535 hours
(ii) 0505 hours
(iii) 2015 hours
(iv) 0400 hours
(v) 0150 hours
(vi) 2020 hours
(vii) 2230 hours
(viii) 1955 hours
VIII. The practice, Charminar Categorical runs between Hyderabad and Chennai. The arrival and departure time of it at totally different stations are given beneath.
Station 
Time 
Hyderabad 
a) __________ d) 1900 
Secunderabad 
a) 1920 d) 1930 
Warangal 
a) 2159 d) 2201 
Khammam 
a) 2346 d) 2348 
Vijayawada 
a) 0145 d) 0155 
Chennai 
a) 0920 d) __________ 
a → Arrival Time
d → Departure Time
Observe the desk and reply the next questions in 12hour clock time.
(i) When does the practice arrive at Warangal station?
(ii) At what time does the practice depart Vijayawada station?
(iii) When does the practice begin from Hyderabad station?
(iv) At what time does the practice attain Chennai?
Reply:
VIII. (i) 9:59 p.m.
(ii) 1:55 a.m.
(iii) 7:00 p.m.
(iv) 9:20 a.m.
Associated Ideas
● To
Measure the Size of a Linesegment
● Examples
on Unit of Mass or Weight
● Items
for The Measurement of Capability
● Examples
on Measurement of Capability
● Antemeridian
(a.m.) or Postmeridian (p.m.)
● Calendar
● Studying
and Deciphering a Calendar
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