Transcript There are 24 different Greenwich Meridian time zones. Time (GMT) is used as standard time.

There are 24 different
Greenwich Meridian
time zones.
Time (GMT) is used
as standard time. It
covers London,
Lisbon and
Casablanca.
Imagine you are
looking at a map. Go
right from GMT and
you add an hour
every zone. Go left
from GMT and you
take away an hour
every zone.
On the
opposite side
of the
Greenwich
Meridian is the
international
date line.
Fun fact: If you travel across the International Date
Line the day after your birthday, you can have your
birthday again on that day.
If we didn’t have Time Zones
• It would be day and night at different times
in different parts of the world.
• Travellers, military and air crew would get
confused about the time, light and when
their bodies need sleep.
• It would be the same date the whole world
round and that’s just boring!