IRST to SLST
Convert Iran Time — Tehran to Sri Lanka Time — Colombo — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Tehran, it's 11:00 AM in Colombo. Colombo is 2 hours ahead of Tehran. Use the converter above to turn any IRST time into SLST, or scan the hour-by-hour table below for the full day.
IRST to SLST at a glance
Planning a meeting between Tehran and Colombo
Planning a call between Tehran and Colombo? The best overlap during a standard 9-to-5 workday runs 9:00 AM–3:00 PM IRST (11:00 AM–5:00 PM SLST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Tehran to Colombo
A full day mapped from IRST to SLST.
Frequently asked
Is Colombo ahead of or behind Tehran?
Colombo is 2 hours ahead of Tehran.
What is 12:00 PM IRST in SLST?
12:00 PM in Tehran is 2:00 PM in Colombo.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so IRST and SLST automatically reflect the correct daylight-saving offset for the current date.