Work in progressTimezonePair is still being built — expect rough edges & missing cities
TimezonePair
Home·Johannesburg·Johannesburg × Tehran
Prime meridian·:: UTC·

Johannesburg×Tehran

South Africa · ZA
Johannesburg
—:—
Africa/Johannesburg·
No DST
Iran · IR
Tehran
—:—
Asia/Tehran·
No DST

Johannesburg is 1.5 hours ahead of Tehran. Scrub a time, meet in the overlap, ship the invite — before the kettle boils.

◊ at a glance

Three numbers. The ones that decide the meeting.

01
Difference
1.5h ahead
Johannesburg vs Tehran
02
Overlap
7h
Business hours 09:00 – 17:00
03
UTC offsets
GMT+2 / GMT+3:30
SAST · Tehran
04
Flight
9h 6m
7,306 km · great-circle, non-stop cruise
◊ the overlap

When the world meets at work.

24-hour overlap
7h shared · 09:00 – 16:00 Johannesburg
Johannesburg
—:—
0
3
6
9
12
15
18
21
Tehran
—:—
Scrub a meeting time14:00 Johannesburg
Same moment in Tehran15:30 Tehran
◊ hour by hour

Read the day in both zones.

Share this meeting
timezonepair.com/from/johannesburg/to/tehran?t=14&a=A&d=2026-04-27&dur=60
14:00 Johannesburg15:30 Tehran
Full 24-hour reference
JohannesburgTehran
00:00
01:00
01:00
02:00
02:00
03:00
03:00
04:00
04:00
05:00
05:00
06:00
06:00
07:00
07:00
08:00
08:00
09:00Tehran only
09:00Both working
10:00
10:00Both working
11:00
11:00Both working
12:00
12:00Both working
13:00
13:00Both working
14:00
14:00Both working
15:00
15:00Both working
16:00
16:00Johannesburg only
17:00
17:00
18:00
18:00
19:00
19:00
20:00
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21:00
21:00
22:00
22:00
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23:00
00:00
◊ common questions

Quick answers. Before you book the call.

What's the time difference between Johannesburg and Tehran?

Johannesburg is 1.5 hours ahead of Tehran. Johannesburg runs on GMT+2 and Tehran on GMT+3:30. The gap can shift by an hour when either side enters or leaves daylight saving — the live clocks above always reflect the current offset.

When's the best time to schedule a meeting?

There are 7 hours where both cities are inside a 09:00–17:00 workday. Aim for the middle of that window so neither side is starting or closing out.

Does daylight saving time change the difference?

Yes, if either city observes DST. When one side shifts and the other doesn't, the gap changes by one hour. The DST badges under each clock show whether each zone is currently shifted and when the next transition lands.

How far is Johannesburg from Tehran?

About 7,306 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 9h 6m, not counting airport time, winds, or routing around restricted airspace.

Can I send this meeting time as a calendar invite?

Yes. Pick a time on the slider above, open the meeting card, customize the title and duration, then download the .ics file. It imports cleanly into Google Calendar, Outlook, and Apple Calendar with the correct timezone attached.

◊ keep going

One pair down. 299 cities to go.

Every pair in 300 cities runs the same clocks, the same overlap, the same one-click invite. Pick another.

JOHANNESBURG · Africa/Johannesburg
GMT+2 · -26.20°, 28.05°

TEHRAN · Asia/Tehran
GMT+3:30 · 35.69°, 51.39°

7h shared · 1.5h ahead