How is Indian Standard Time decided?

Related questions

1. Why is Indian time half an hour?
2. Which country is most ahead in time?
3. Is it OK to eat 3 bananas a day?
4. Does India change their clocks?
5. What time is the Supermoon?
6. What is the importance of Indian Standard Time?
7. Which is the largest and smallest Indian state in terms of area?
8. What country has the latest time zone?
9. What happens to your body if you eat 2 bananas a day for a month?
10. What is the best time to eat curd?

Tags

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2. #longitude
3. #which
4. #corresponding
5. #mirzapur
6. #chauraha
7. #amravati
8. #uttar
9. #pradesh
10. #india
11. #observed
12. #offset
13. #calculated
14. #nearly
15. #standard
16. #throughout
17. #basis
18. #reference