IRST — Iran Standard Time
UTC+03:30 · 3 hours and 30 minutes ahead of UTC
Details
| Abbreviation | IRST |
| Full name | Iran Standard Time |
| UTC offset | UTC+03:30 |
| IANA identifier | Asia/Tehran |
| DST | Not observed |
Countries Using IRST
Time Difference from IRST
| City | Difference |
|---|---|
| New York | +7h 30m |
| Chicago | +8h 30m |
| Los Angeles | +10h 30m |
| London | +2h 30m |
| Paris | +1h 30m |
| Moscow | +0h 30m |
| Dubai | -0h 30m |
| Mumbai | -2h |
| Bangkok | -3h 30m |
| Shanghai | -4h 30m |
| Tokyo | -5h 30m |
| Sydney | -6h 30m |
| Auckland | -8h 30m |
Using IRST in practice
Planning notes for business hours, handoffs, and recurring meetings in this timezone.
Right now
It is currently afternoon in IRST, which is inside a normal workday. Standard business-hour checks should use 9:00 AM-5:00 PM local time.
Best overlap
The best listed workday overlap is with Moscow: 9:30 AM-5:30 PM IRST equals 9:00 AM-5:00 PM there.
Recurring events
This zone has no listed DST shift, which keeps recurring events simpler across the year.
| Market | IRST | Their time |
|---|---|---|
| Moscow | 9:30 AM-5:30 PM | 9:00 AM-5:00 PM |
| Dubai | 9:30 AM-4:30 PM | 10:00 AM-5:00 PM |
| Paris | 10:30 AM-5:30 PM | 9:00 AM-4:00 PM |
| London | 11:30 AM-5:30 PM | 9:00 AM-3:00 PM |
| Mumbai | 9:30 AM-3:30 PM | 11:30 AM-5:30 PM |
| Bangkok | 9:30 AM-1:30 PM | 1:00 PM-5:00 PM |
Convert IRST to Other Time Zones
Cities in IRST
About IRST (Iran Standard Time)
IRST (Iran Standard Time) is a time zone with a UTC offset of +03:30, meaning it is 3 hours and 30 minutes ahead of UTC. The IANA timezone database identifies it as Asia/Tehran. It is used in 1 country, including Iran.
IRST does not observe daylight saving time. The UTC offset of +03:30 remains the same throughout the year, which simplifies scheduling with locations in this time zone.
Major cities in IRST include Tehran, and 90 more.
Frequently Asked Questions
What is IRST?
IRST stands for Iran Standard Time. It is 3 hours and 30 minutes ahead of UTC (UTC+03:30). The IANA timezone identifier is Asia/Tehran.
What is the current time in IRST?
The current IRST time is shown at the top of this page and updates every second. IRST is UTC+03:30, which is 3 hours and 30 minutes ahead of UTC.
Does IRST observe daylight saving time?
No, IRST does not observe daylight saving time. The UTC offset of +03:30 remains constant throughout the year.
What countries use IRST?
Countries and regions using IRST include Iran.
How do I convert IRST to my local time?
Use our time zone converter to convert IRST to any other time zone. You can also check the time difference table on this page which shows the offset between IRST and 13 major world cities.