IRST to SAST
Convert Iran Time — Tehran to South Africa Time — Johannesburg — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Tehran, it's 7:30 AM in Johannesburg. Johannesburg is 1½ hours behind Tehran. Use the converter above to turn any IRST time into SAST, or scan the hour-by-hour table below for the full day.
IRST to SAST at a glance
Planning a meeting between Tehran and Johannesburg
Planning a call between Tehran and Johannesburg? The best overlap during a standard 9-to-5 workday runs 10:30 AM–5:00 PM IRST (9:00 AM–3:30 PM SAST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Tehran to Johannesburg
A full day mapped from IRST to SAST.
Frequently asked
Is Johannesburg ahead of or behind Tehran?
Johannesburg is 1½ hours behind Tehran.
What is 12:00 PM IRST in SAST?
12:00 PM in Tehran is 10:30 AM in Johannesburg.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so IRST and SAST automatically reflect the correct daylight-saving offset for the current date.