Quiz: What do you know about time zones?

Welcome to your What do you know about the time zones

How many geographical time zones exist on Earth?

What is the width of each time zone?

From which meridian are the time zones counted?

What time zone does Ukraine belong to?

The time zone of Ukraine:

In autumn, clocks in Ukraine are:

Who was the first in the world to express the idea of switching to "summer" time?

In what part of the time zone do you need to be so that the Sun is exactly overhead at noon?