SLST to IRST
Convert Sri Lanka Time — Colombo to Iran Time — Tehran — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Colombo, it's 7:00 AM in Tehran. Tehran is 2 hours behind Colombo. Use the converter above to turn any SLST time into IRST, or scan the hour-by-hour table below for the full day.
SLST to IRST at a glance
Planning a meeting between Colombo and Tehran
Planning a call between Colombo and Tehran? The best overlap during a standard 9-to-5 workday runs 11:00 AM–5:00 PM SLST (9:00 AM–3:00 PM IRST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Colombo to Tehran
A full day mapped from SLST to IRST.
Frequently asked
Is Tehran ahead of or behind Colombo?
Tehran is 2 hours behind Colombo.
What is 12:00 PM SLST in IRST?
12:00 PM in Colombo is 10:00 AM in Tehran.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so SLST and IRST automatically reflect the correct daylight-saving offset for the current date.