10.30 pm
The answer to this question will depend on what you are using the abbreviation IST to stand for. IST could represent Irish Summer Time, Israeli Standard Time, Iran Standard Time, or Indian Standard Time. The time zone information for each is below to compare to GMT: Irish Summer Time GMT/UTC +1 Israeli Standard Time GMT/UTC +2 Iran Standard Time GMT/UTC +3:30 Indian Standard Time GMT/UTC +5:30 Examples: If it were GMT 8:30 am, the Irish Summer Time would be 9:30 am. If it were GMT 8:30 am, the Israeli Standard Time would 10:30 am. If it were GMT 8:30 am, the Iran Standard Time would 12:00 pm (noon). If it were GMT 8:30 am, the Indian Standard Time would 2:00 pm.
India Standard Time (IST) is 5:30 hours ahead of GMT.
India Time - Indian Standard Time (IST) UTC/(GMT) +5.5
All of India is GMT +5.30 Hrs [GMT + 5.50 Hrs is wrong by 20 mins!] - Suneel Mannan
1640 GMT is 21:10 Indian Standard Time (IST). India is 5 hours and 30 minutes ahead of GMT, so you add that to the GMT time to get the equivalent IST time.
5.30
The GMT of India is the Indian Standard time less five and half hours.
To convert a time given in GMT to India time, add 5½ hours.
The answer to this question will depend on what you are using the abbreviation IST to stand for. IST could represent Irish Summer Time, Israeli Standard Time, Iran Standard Time, or Indian Standard Time. The time zone information for each is below to compare to GMT: Irish Summer Time GMT/UTC +1 Israeli Standard Time GMT/UTC +2 Iran Standard Time GMT/UTC +3:30 Indian Standard Time GMT/UTC +5:30 Examples: If it were GMT 8:30 am, the Irish Summer Time would be 9:30 am. If it were GMT 8:30 am, the Israeli Standard Time would 10:30 am. If it were GMT 8:30 am, the Iran Standard Time would 12:00 pm (noon). If it were GMT 8:30 am, the Indian Standard Time would 2:00 pm.
India Standard Time is five and a half hours ahead of Greenwich Mean Time.
The US state of Florida follows two time zones. Eastern Florida has Eastern Time Zone which is GMT -5h and Western Florida follows Central Time Zone which is GMT -6h. The country India follows Standard Time Zone GMT +5.30h Hence, the time differencebetween Indian standard time and Florida standard time is approximately, ten and a half hour.
5hours and 30 minutes
India Standard Time (IST) is 5:30 hours ahead of GMT.
India Time - Indian Standard Time (IST) UTC/(GMT) +5.5
All of India is GMT +5.30 Hrs [GMT + 5.50 Hrs is wrong by 20 mins!] - Suneel Mannan
1640 GMT is 21:10 Indian Standard Time (IST). India is 5 hours and 30 minutes ahead of GMT, so you add that to the GMT time to get the equivalent IST time.
Eastern Standard Time zone {EST} = GMT-5 Central Standard Time zone {CST} = GMT -6 Mountain Standard Time zone {MST} = GMT -7 Pacific Standard Time zone {PST} = GMT -8 Alaska Standard Time zone {AST} = GMT -9 Hawaii Standard Time zone {HST}= GMT -10