Unit 14 Section 3 : Units of Time
In this section we explore the different units of time.
1 minute  =  60 seconds 
1 hour  =  60 minutes 
1 day  =  24 hours 
1 week  =  7 days 
1 year  =  365 days (or 366 in a leap year) 
There are twelve months in one year, but the number
of days in each month varies. Also, some years are
leap years, which means that February has 29 days
instead of 28. This results in leap years having 366
days instead of the usual 365.

January  has  31 days 
February  has  28 days (or 29 in a leap year) 
March  has  31 days 
April  has  30 days 
May  has  31 days 
June  has  30 days 
July  has  31 days 
August  has  31 days 
September  has  30 days 
October  has  31 days 
November  has  30 days 
December  has  31 days 

Example Question
Example Question 1
How many hours are there in May?
There are 31 days in May, each with 24 hours.
31 × 24 = 744 so there are 744 hours in May.
Example Question 2
25 February is a Friday. What will the date be on the next Friday
(a) if it is not a leap year,
(b) if it is a leap year?
We could just count on 7 days from the first date: 
Not in a leap year
Start: Friday 25
+1: Saturday 26 February
+2: Sunday 27 February
+3: Monday 28 February
+4: Tuesday 1 March
+5: Wednesday 2 March
+6: Thursday 3 March
+7: Friday 4 March

In a leap year
Start: Friday 25
+1: Saturday 26 February
+2: Sunday 27 February
+3: Monday 28 February
+4: Tuesday 29 February
+5: Wednesday 1 March
+6: Thursday 2 March
+7: Friday 3 March

We could also add on 7 to the first date, then take away the number of days in February: 
Not in a leap year
25 + 7 = 32
32  28 = 4 (4 March)

In a leap year
25 + 7 = 32
32  29 = 3 (3 March)

Either method above will allow you to find the answers. 
Exercises
Work out the answers to the questions below and fill in the boxes. Click on the
button to find out whether you have answered correctly. If you are right
then will appear and you should move on to the next
question. If appears then your answer is wrong. Click
on to clear your original answer and have another go.
If you can't work out the right answer then click on
to see
the answer.
NOTE: You must give all dates in the form 3 November or 12 May
or your answers may be marked incorrectly.
You have now completed Unit 14 Section 3
Since these pages are under
development, we find any feedback extremely valuable. Click
here to fill out a very short form which allows you make comments about
the page, or simply confirm that everything works correctly.

Return to the Tutorials Menu
Produced by A.J. Reynolds January 2001