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Grade 7: The Learning Equation Math

31.03 Time Zones

3icon.gif (4368 bytes)

Measurement

Refresher pp 58-59

Learning Outcomes:

The student will:

learn how time zones are determined.

Have you noticed different cities have different times? Did you know some cities do not use Daylight Savings Time.

Daylight Savings Time Add 1 hour Last Sunday in October to last Sunday in March				No Daylight Savings Time
Edmonton, Alberta, Canada	Toronto, Ontario,Canada	London, England	New Delhi, India	Buenos Aires, Argentina	Shanghai, China
San Salvador, El Salvador	Charlettetown, PEI, Canada	Cairo	Islamabad, Pakistan	Riyadh, Saudia Arabia	Beijing, China
Tepic, Mexico	Cleveland, Ohio	Damascus, Syria		Sanaa,Yemen	Taipei, Taiwan
	Santiago, Chile	Nairobi, Kenya			Singapore City, Singapore
		Timisoara, Romania			Tokyo, Japan
source: http://www.worldtimeserver.com/clocks/wtsclock001.aspx?locationid=AS

The World Map may assist you to calculate time differences between countries.

To calculate time differences between countries, locate the time zone for each country by referring to the numbers from 1 to 24 at the bottom of the map. Subtract the lower number from the higher number to find the difference in hours.

source: MONTAGE: World Map with Time Zones

Dual Time Clock

Click on the map, and you will see the time at any place in the world.

Note: Daylight Saving Time not included.

source: Applet

The local time zone reported by your computer is shown in the first box. Ensure that this is correct otherwise the calculated time will be incorrect. If you have local daylight saving, correct the local time zone and check the local daylight saving box.

Select a remote time zone in the second box, and the time in that remote time zone will be displayed in the third box. Checking the remote daylight saving box will add one hour to the remote time.

Your local time zone:

Local Daylight Saving

Remote time zone:

Remote Daylight Saving

Time in remote time zone:

The time displayed is based on your system clock, and is updated each minute. If your system clock is incorrect, the displayed time will also be incorrect. An excellent program to set your system clock accurately over the internet is Tardis.

Please check the time displayed by this utility for yourself. By using this utility, you agree to indemnify Grahame Bowland from any liability that may arise from its use.

If you have any comments or suggestions please send me feedback.

source: World Time Calculator 2.1 by Grahame Bowland

World timezones map with current time - cool

world time clock

WORLDTIME: interactive atlas, time info, public holidays

World Clock

Key Terms:

A-E

F-J

K-O

P-R

S-Z

degree, rotation, sphere, time zone

Prerequisite Skills:

Read and write time on a 24-hour clock.

Free JavaScripts provided
by The JavaScript Source

source: http://student.iu.hioslo.no/~singhr/download/download.html

Analog/Digital Clock

You can display either analog clock and digital clock. Click this applet to switch
between analog and digital clock.

As an additional feature, you can also change the time zone of this clock. Select a
city from the list box below and then click Select button.

source: Antony's Freeware Page - Java Clock Applet