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.

IRST to SAST

-1h 30m

IRST

IRSTSOURCE

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

IRST

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

Everything You Need to Know About IRST and SAST Time

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

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

IRST to SAST time conversion table

IRST (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 IRST to SAST time

Scheduling a call from IRST to SAST: a 10:00 AM start in IRST lands at 8:30 AM in SAST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both IRST 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.
Coordinating a IRST-based team with SAST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

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 IRST 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 IRST and SAST

Both IRST 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

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

IRST 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 IRST and SAST?

IRST (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 IRST time to SAST time?

Add -1h 30m to IRST local time. For example, 9:00 AM in IRST 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 IRST.