Do you know time differences (时差)?

Li Lei has breakfast in the restaurant. At the same time, it's eight o'clock in the morning in Japan and Anna is at school. In the USA, it's seven o'clock in the evening. Jack is Bob's friend. And Bob is at Jack's home now. It's seven o'clock in the evening in Canada. They often go home by bus. Now it's seven o'clock in the evening in Cuba, too. Maria is at home. After dinner, she can watch TV with them. Charlie is in bed. He goes to bed at ten o'clock in the evening every day.