Why are there 24 time zones?

Related questions

1. How many hours does it take from USA to South Africa?
2. Do we change clocks tonight?
3. Is Australia time ahead of the US?
4. Is Melbourne and Sydney time the same?
5. Where is the last place to celebrate New Year's?
6. How far behind is New York?
7. Does the UK do Daylight Savings?
8. What is the GMT of Eastern Standard Time?
9. What does 3pm BST mean?
10. What is GMT time now in UK?

Tags

1. #every
2. #earth
3. #minutes
4. #zones
5. #sections
6. #moves
7. #completed
8. #rotates
9. #scientists
10. #circle
11. #rotation
12. #planet
13. #information
14. #divide
15. #hours
16. #longitude
17. #about
18. #degrees
19. #after