Iran Standard Time (IRST)
IRST is UTC+3:30. Current Iran Standard Time and when IRST applies.
Iran Standard Time now
--:--:--
Saturday, September 19, 2026
IRSTUTC+3:30
IRST does not change for daylight saving time
About IRST
- Full Name
- Iran Standard Time
- Abbreviation
- IRST
- UTC Offset
- UTC+3:30
- Iran Standard Time is on
- Standard Time (IRST)
- Daylight Saving Time
- Not observed — IRST is UTC+3:30 all year
Iran Standard Time (IRST) is UTC+3:30, a half-hour offset used throughout Iran. Iran abolished daylight saving time in 2022, so IRST now applies all year.
Where IRST is used
IRST all year (no DST)
- All of Iran (Tehran, Mashhad, Isfahan)
Major Cities in Iran Standard Time
Each city shows its own current abbreviation, so places on daylight saving time are labelled accordingly.
IRST vs Other Time Zones
| Comparison | By definition | Right now (local clocks) |
|---|---|---|
| IRST to GST | +30 minutes | +30 minutes |
| IRST to PKT | +1 hour 30 minutes | +1 hour 30 minutes |
| IRST to MSK | -30 minutes | -30 minutes |
| IRST to UTC | -3 hours 30 minutes | -3 hours 30 minutes |
“By definition” compares the fixed offsets of the abbreviations. “Right now” compares the actual local time in each region today, including daylight saving time.
IRST FAQs
What is IRST?
Iran Standard Time (IRST) is UTC+3:30, a half-hour offset used throughout Iran. Iran abolished daylight saving time in 2022, so IRST now applies all year.
What is the UTC offset of IRST?
IRST is always UTC+3:30 and never changes for daylight saving time.
Does IRST change for daylight saving time?
No. IRST stays at UTC+3:30 all year. Its difference from places that do observe daylight saving time, such as US Eastern Time, changes when those places switch.
Where is IRST used all year?
These places use UTC+3:30 all year without daylight saving time: All of Iran (Tehran, Mashhad, Isfahan).