Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Tehran to SAST

-1h 30m

Tehran

IRSTSOURCE

Iran · UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

SAST

UTC+02:00

HH10

MM30

10:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Tehran

SAST

12:00 AM

10:30 PM-1

2:00 AM

12:30 AM

4:00 AM

2:30 AM

6:00 AM

4:30 AM

8:00 AM

6:30 AM

10:00 AM

8:30 AM

12:00 PM

10:30 AM

2:00 PM

12:30 PM

4:00 PM

2:30 PM

6:00 PM

4:30 PM

8:00 PM

6:30 PM

10:00 PM

8:30 PM

Green rows indicate typical business hours (9 AM - 5 PM)

IRST and SAST on the World Map

The map below highlights the IRST (Iran Standard Time) and SAST (South Africa Standard Time) timezone regions across the globe.

IRST Zone

→

SAST Zone

Explore all world timezones interactively →

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

SAST – South Africa Standard Time

UTC+02:00

South Africa Standard Time (SAST) is the time zone for South Africa and neighboring countries, 2 hours ahead of UTC.

Countries in SAST

South AfricaLesothoEswatini

Major Cities in SAST

JohannesburgCape TownDurbanPretoriaPort Elizabeth

Key Facts about SAST

•South Africa does not observe daylight saving time.
•SAST is the same offset as EET and Israel Standard Time.
•The Johannesburg Stock Exchange (JSE) is Africa's largest.

Daylight Saving:No – UTC+02:00 year-round

Learn more about SAST on Wikipedia

About Tehran

Wikipedia

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

Population:9.4 million

Metro:16.8 million

Business Hours:8:00 AM - 4:00 PM IRST

Currency:IRR (﷼)

Stock Exchange:TSE (Tehran Stock Exchange)

Key Landmarks

Azadi TowerGolestan PalaceGrand BazaarMilad TowerTabiat Bridge

Did You Know?

Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).

Learn more about IRST timezone →

Tehran to SAST Time Difference – Complete Guide

Tehran runs on Iran Standard Time (IRST) at UTC+03:30. SAST runs on South Africa Standard Time (SAST) at UTC+02:00. That puts Tehran 1 hour 30 minutes behind SAST — a difference of -1h 30m at the current offsets.

In practice, when it is 9:00 AM in Tehran it is 7:30 AM in SAST. Midnight in Tehran is 10:30 PM in SAST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Tehran to SAST time conversion table

Tehran (IRST)	SAST (SAST)	Day
12:00 AM	10:30 PM	previous day
6:00 AM	4:30 AM	same day
7:00 AM	5:30 AM	same day
8:00 AM	6:30 AM	same day
9:00 AM	7:30 AM	same day
12:00 PM	10:30 AM	same day
3:00 PM	1:30 PM	same day
5:00 PM	3:30 PM	same day
6:00 PM	4:30 PM	same day
9:00 PM	7:30 PM	same day

Why people convert Tehran to SAST time

Scheduling a call from Tehran to SAST: a 10:00 AM start in Tehran lands at 8:30 AM in SAST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Tehran and SAST are inside the 9-to-5 working day between 10:30 AM and 5:00 PM IRST time (9:00 AM–3:30 PM SAST). That is roughly 6 hours 30 minutes of usable overlap.
Watching a live event or market open: Tehran viewers need 7:30 AM in SAST to catch a 9:00 AM start there, and 1:30 AM if the event is anchored to Tehran.

Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a -1h 30m gap is not.
Block 10:30 AM–5:00 PM IRST as the recurring meeting window if you work primarily from Tehran and need SAST colleagues present.

About IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

About SAST (South Africa Standard Time)

South Africa Standard Time (SAST) is used in South Africa, Lesotho, and Eswatini. SAST does not observe daylight saving time. Johannesburg and Cape Town are major economic hubs in Africa.

Best time to call between Tehran and SAST

Both Tehran and SAST sit inside the 9 AM – 5 PM working day between 10:30 AM–5:00 PM IRST, which is 9:00 AM–3:30 PM SAST. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Tehran and SAST share 6 hours of working-hours overlap (10:30 AM–5:00 PM IRST), so scheduling a live meeting is straightforward.

Tehran is 1 hour 30 minutes behind SAST (IRST UTC+03:30 → SAST UTC+02:00). The shared working window is 10:30 AM–5:00 PM IRST. Remember to re-check around daylight-saving transitions.

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Tehran and SAST?

Tehran (IRST, UTC+03:30) is 1 hour 30 minutes behind SAST (SAST, UTC+02:00). The gap is currently -1h 30m.

How do I convert Tehran time to SAST time?

Add -1h 30m to Tehran local time. For example, 9:00 AM in Tehran is 7:30 AM in SAST.

What time is it in SAST right now?

SAST uses SAST at UTC+02:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h 30m offset from Tehran.

What is the best time to call SAST from Tehran?

Call between 10:30 AM and 5:00 PM IRST — that maps to 9:00 AM–3:30 PM SAST and keeps both parties inside the working day.

Which is behind, Tehran or SAST?

Tehran is 1 hour 30 minutes behind SAST. When it is 12:00 PM in Tehran it is 10:30 AM in SAST.

Do Tehran and SAST use different time zones?

Tehran (Iran) uses IRST at UTC+03:30, while SAST uses SAST at UTC+02:00. The IANA identifiers are Asia/Tehran and Africa/Johannesburg.

Does daylight saving time affect the Tehran–SAST difference?

Neither zone observes daylight saving time, so the -1h 30m offset between Tehran and SAST is fixed all year.

Which other cities share Tehran's time zone?

IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.

Which countries use IRST, Tehran's zone?

IRST is used in Iran.

Is there a day difference between Tehran and SAST?

Not normally. The -1h 30m gap only pushes the date over the previous day.

What is the time difference between Tehran and SAST?

SAST is -1h 30m from Tehran.

What timezone is Tehran in?

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.