Units of Time

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Units of Time

Units of time are not part of the decimal system so they do not go up in powers of 10.

Units of time

The units of time from shortest to longest are:
Second, minute, hour, day, week, month, year, century, millennium.

Relations between units

These are the number of shorter time units in the next bigger one.
- 60 seconds = 1 minute.
- 60 minutes = 1 hour.
- 24 hours = 1 day.
- 7 days = 1 week.
- 4 weeks is roughtly the same as 1 month.
- 12 months = 1 year.
- 100 years = 1 century.
- 1000 years = 1 millenium.

Days in a year

1 calendar year is equal to 365 days.
However, 1 year is actually closer to 365¹/₄ days long.
This means every four years we have an extra ‘catch up’ day called a leap year.
- A leap year has 366 days.
The extra day is always 29th February.

Months of the Year

There are twelve months in a year. Some months have more days than others.

Months of the Year

The names of the months of the year in order are:
January, February, March, April, May, June, July, August, September, October, November, December.

Number of days

The months do not all have the same number of days.
Some have 30 and some have 31.
February has only 28, unless it is a leap year.
- During a leap year, February has 29 days.

Remembring days in a month

Here is an old English poem to learn the number of days in each month:
- Thirty days hath September,
- April, June, and November;
- All the rest have thirty-one,
- Excepting February alone,
- And that has twenty-eight days clear
- And twenty-nine in each leap year.

1Year 3 - Number

2Year 3 - Measurement

2.1Length

2.1.1Length

2.1.2Comparing Lengths

2.1.3Add & Subtract Lengths

2.1.4Perimeter

2.2Mass

2.2.1Mass

2.2.2Comparing Masses

2.2.3Add & Subtract Masses

2.3Volume & Capacity

2.3.1Volume & Capacity

2.3.2Comparing Volumes

2.3.3Add & Subtract Volumes

2.4Money

2.4.1Money

2.4.2Counting Money

2.4.3Adding & Subtracting Money

2.5Time

2.5.1Units of Time

2.5.2Clocks

2.5.3Telling the Time

2.5.4Time of the Day

2.5.512-Hour & 24-Hour Clocks

2.5.6Measuring Time

3Year 3 - Geometry

3.1Angles

3.1.1Angles in Degrees

3.1.2Types of Angle

3.2Properties of Shapes

3.2.12D Shapes

3.2.23D Shapes

3.3Straight Lines

3.3.1Straight Lines

3.3.2Parallel & Perpendicular Lines

4Year 3 - Statistics

4.1Statistics

4.1.1Statistics

4.1.2Pictograms & Bar Charts

5Year 4 - Number

6Year 4 - Measurement

6.1Units

6.1.1Metric Measurements

6.1.2Adding & Subtracting Money

6.2Time

6.2.1Converting Units of Time

6.2.2Changing the 12-Hour Clock to the 24-Hour Clock

6.2.3Changing the 24-hour Clock to the 12-Hour Clock

7Year 4 - Geometry

7.1Properties of Shapes

7.1.1Symmetry

7.1.2Types of Triangle

7.1.3Quadrilaterals

7.2Perimeter & Area

7.2.1Perimeter

7.2.2Area

7.3Position & Direction

7.3.1Coordinates

7.3.2Translation

8Year 4 - Statistics

8.1Statistics

8.1.1Types of Data

8.1.2Pictograms & Bar Charts

8.1.3Line Graphs

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