The time difference
Johannesburg is 3 hours 30 minutes behind India all year. Neither place changes its clocks, so the difference never moves. India is always UTC+5:30, known as IST.
India time to Johannesburg time
Good hours to start a call (8 am to 9 pm in both places): from 12:00 pm to 8:00 pm India time. Hours that start inside office time (9 am to 6 pm) in both: 1:00 pm to 5:00 pm India time.
| India (IST) | Johannesburg |
|---|---|
| 12:00 am | 8:30 pm previous day |
| 1:00 am | 9:30 pm previous day |
| 2:00 am | 10:30 pm previous day |
| 3:00 am | 11:30 pm previous day |
| 4:00 am | 12:30 am |
| 5:00 am | 1:30 am |
| 6:00 am | 2:30 am |
| 7:00 am | 3:30 am |
| 8:00 am | 4:30 am |
| 9:00 am | 5:30 am |
| 10:00 am | 6:30 am |
| 11:00 am | 7:30 am |
| 12:00 pm | 8:30 am |
| 1:00 pm | 9:30 am |
| 2:00 pm | 10:30 am |
| 3:00 pm | 11:30 am |
| 4:00 pm | 12:30 pm |
| 5:00 pm | 1:30 pm |
| 6:00 pm | 2:30 pm |
| 7:00 pm | 3:30 pm |
| 8:00 pm | 4:30 pm |
| 9:00 pm | 5:30 pm |
| 10:00 pm | 6:30 pm |
| 11:00 pm | 7:30 pm |
Worked examples
All year. An office that closes at 6:00 pm in India closes when it is 2:30 pm in Johannesburg. A 9:00 am start in Johannesburg is 12:30 pm in India, and its 6:00 pm finish is 9:30 pm in India. A message sent at 10:30 pm from India lands at 7:00 pm in Johannesburg.
When the date is different
Johannesburg is behind India, so for 3 hours 30 minutes of every day the calendar date differs: from midnight until 3:30 am India time, it is still the previous day in Johannesburg. Mention the date as well as the time when you fix something in those hours.
Why the gap is what it is
Indian Standard Time follows the sun at longitude 82.5° east. The zone that Johannesburg belongs to has its largest city, Johannesburg, at about 28° east. The sun crosses the sky between those two lines in about 3 hours 38 minutes. Clock time rounds that to a tidy figure: 3 hours 30 minutes. The two figures differ because every country picks a round offset that suits its whole territory, and some add summer time on top.
Rows marked in colour fall between 8 am and 9 pm in both places. Dates are from the IANA time zone database 2026f.
More
Read about time in Johannesburg or time in India. Other conversions from India: New York, Chicago, Denver, Los Angeles, Toronto, London, Paris, Berlin, Moscow, Dubai, Riyadh, Doha, Kuwait, Karachi, Kathmandu, Dhaka, Colombo, Singapore, Kuala Lumpur, Bangkok, Hong Kong, Shanghai, Tokyo, Seoul, Sydney, Melbourne, Perth, Auckland, Nairobi.