Time difference between Tehran and Johannesburg
Johannesburg is 1 hour 30 minutes behind Tehran. When it's 9:00 in Tehran, it's 07:30 in Johannesburg.
Johannesburg is 1 hour 30 minutes behind Tehran.
On Friday, 2 October 2026, 09:00 in Tehran is 07:30 in Johannesburg. Tehran is UTC+3:30; Johannesburg is UTC+2.
The gap through 2026
It stays 1 hour 30 minutes all year — neither city changes its clocks against the other.
Tehran to Johannesburg, hour by hour
On Monday 5 October.
| Tehran | Johannesburg |
|---|---|
| 07:00 Early morning | 05:30 Sleeping hours |
| 08:00 Early morning | 06:30 Sleeping hours |
| 09:00 Working hours | 07:30 Early morning |
| 10:00 Working hours | 08:30 Early morning |
| 11:00 Working hours | 09:30 Working hours |
| 12:00 Working hours | 10:30 Working hours |
| 13:00 Working hours | 11:30 Working hours |
| 14:00 Working hours | 12:30 Working hours |
| 15:00 Working hours | 13:30 Working hours |
| 16:00 Working hours | 14:30 Working hours |
| 17:00 Evening | 15:30 Working hours |
| 18:00 Evening | 16:30 Working hours |
| 19:00 Evening | 17:30 Evening |
| 20:00 Evening | 18:30 Evening |
| 21:00 Evening | 19:30 Evening |
| 22:00 Sleeping hours | 20:30 Evening |
Daylight saving in 2026
Neither Tehran nor Johannesburg changes its clocks, so the difference is the same all year.
Best times for a call
Working hours (09:00–17:00) overlap for 6 hours 30 minutes: 10:30–17:00 in Tehran, which is 09:00–15:30 in Johannesburg.
- Tehran 10:30Working hoursJohannesburg 09:00Working hours
- Tehran 11:30Working hoursJohannesburg 10:00Working hours
- Tehran 12:30Working hoursJohannesburg 11:00Working hours
More time differences for Tehran and Johannesburg
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How the time difference calculator works
The difference is each city's offset from UTC on the date you pick, subtracted. Offsets come from the IANA time zone database in your browser.
Because countries change their clocks on different dates — or not at all — the gap between two cities can change for a few weeks a year. The calculator lists every change in the year.
Examples
- London is 5 hours ahead of New York for most of the year, but only 4 hours ahead for about three weeks in March and one week in late October.
- Dubai doesn't change its clocks, so its gap to London is 4 hours in winter and 3 hours in summer.
Good for
- Knowing when a colleague's day starts
- Setting expectations for replies across time zones
- Planning travel and jet lag
Frequently asked questions
- What time is it in Johannesburg when it's 9 AM in Tehran?
- 7:30 AM — as of 2 October 2026. Johannesburg is 1 hour 30 minutes behind Tehran.
- Does the time difference between Tehran and Johannesburg change?
- No. It's 1 hour 30 minutes all through 2026: neither city changes its clocks.
- What's the best time for a call between Tehran and Johannesburg?
- Between 10:30 and 17:00 Tehran time, when both cities are in working hours (09:00–17:00).
- What time zones are Tehran and Johannesburg in?
- Tehran uses Asia/Tehran (UTC+3:30 today); Johannesburg uses Africa/Johannesburg (UTC+2 today).
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See everyone's local time as you schedule
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