You are in Georgia. It is 6:00 p.m. You call a friend in California. But she is not home. That is because it is 3:00 p.m. in California. She is still at school!
Georgia and California are in different time zones . They are three hours apart. People in different places set their clocks to different times. Why? The Earth spins. When the sun is rising in one part of the world, it is setting in another.
This map shows the four main time zones in the United States. Can you find your state? (Alaska and Hawaii are not shown.) Which time zone are you in?