A LOOK AT TIME47THE TIME BELOW IS...
Some countries are split into several time zones, whereas
others lie in just one. If you fly from one side of the
United States to the other, you’ll find a time zone
difference of four hours. In contrast, China has just one
official time across the whole country, despite its size.
INTERNATIONAL DATE LINE
This imaginary line separates one day
from the next.The International Date
Line used to run through the islands of
the Republic of Kiribati, so that it was
a different day on different islands.
In 1995, the line was moved east to
put Kiribati in a single time zone.Time traveler The system of
worldwide, standardized time zones
was first proposed by Canadian
Sir Sandford Fleming in 1878.
He pointed out that the world is
divided into 360 degrees of longitude
(imaginary lines running from north to
south), and that these could be split into
24 time zones of 15 degrees each.NORTH
AMERICASOUTH
AMERICAOne time zoneTIME ZONE LINES
are not as straight as
shown here. Some shift
east or west to take in a
country’s borders.Your internal body clock
tells you when to wake and
sleep. Plane passengers who cross
several time zones may experience
jet lag, which makes them tired
during the day, but restless
at night.W
OW!
EARTH■ The world’s time zones meet
at the North and South poles.
By walking around the poles
themselves, it’s possible to travel
through all the world’s time zones
in a matter of seconds.THE POLES
HawaiiKiribati