How GMT is calculated?

Related questions

1. How is latitude and longitude calculated?
2. Are we in GMT?
3. How was longitude calculated?
4. What time zone is GMT 4?
5. How do you calculate longitude and time?
6. Does Singapore have Daylight Savings?
7. What GMT time zone is PST?
8. What is the GMT time now in Singapore?
9. Which country uses GMT time zone?
10. What time zone does Singapore use?

Tags

1. #round
2. #greenwich
3. #since
4. #which
5. #where
6. #earth
7. #needs
8. #through
9. #prime
10. #meridian
11. #there
12. #north
13. #calculated
14. #either
15. #things
16. #notational
17. #begin
18. #england
19. #south
20. #minus