What does the G in GMT mean?

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Tags

1. #located
2. #which
3. #answer
4. #england
5. #meridian
6. #basis
7. #observatory
8. #prime
9. #greenwich
10. #countries
11. #royal
12. #officially
13. #world
14. #civil
15. #former
16. #local
17. #universal
18. #known
19. #standard