Current IRST time
· week 43 · day 294/365
Iran Standard Time
IRST means Iran Standard Time. It is fixed at UTC+3:30 and does not change for daylight saving time.
- Zone
- IRST
- UTC offset
- UTC+3:30
- DST
- No
- Next change
- None
- Countries
- 1
- Representative IANA zones
- 1
- 09:00 in UTC
- 05:30
These IANA zones keep UTC+3:30 under the current tzdb rules; historical offsets may differ.
Asia/Tehran
Time difference with your location
Iran Standard Time is 3 hours 30 minutes ahead of UTC. Compare with your local time →
Where this time is used
Cities in 1 countries keep UTC+3:30 throughout 2026. Sharing an offset does not necessarily mean using the same abbreviation.
| Country | States / provinces | Cities |
|---|---|---|
| Iran | — | 423 |
Countries and cities in this time zone · IRST
12 representative cities below currently show UTC+3:30.
Other zones with the same UTC offset
1 other time zones share UTC+3:30 with IRST right now. Regional zones may leave this offset when their clocks change.
Quick conversions · IRST
IRST = UTC+3:30, so 09:00 IRST = 05:30 UTC (on the corresponding UTC day). These 40 zones show the equivalent of 09:00 IRST using today's offsets.
| Time zone | UTC · difference | 09:00 IRST = |
|---|---|---|
| IRST to UTCCoordinated Universal Time | UTC+0−3h30m | 05:30 |
| IRST to ESTEastern Standard Time | UTC-5−8h30m | 00:30 |
| IRST to ISTIndia Standard Time | UTC+5:30+2h | 11:00 |
| IRST to PSTPacific Standard Time | UTC-8−11h30m | 21:30 |
| IRST to GMTGreenwich Mean Time | UTC+0−3h30m | 05:30 |
| IRST to CSTCentral Standard Time | UTC-6−9h30m | 23:30 |
| IRST to MSTMountain Standard Time | UTC-7−10h30m | 22:30 |
| IRST to CETCentral European Time | UTC+1−2h30m | 06:30 |
| IRST to AESTAustralian Eastern Standard Time | UTC+10+6h30m | 15:30 |
| IRST to ICTIndochina Time | UTC+7+3h30m | 12:30 |
| IRST to JSTJapan Standard Time | UTC+9+5h30m | 14:30 |
| IRST to KSTKorea Standard Time | UTC+9+5h30m | 14:30 |
| IRST to SGTSingapore Time | UTC+8+4h30m | 13:30 |
| IRST to HKTHong Kong Time | UTC+8+4h30m | 13:30 |
| IRST to BSTBritish Summer Time | UTC+1−2h30m | 06:30 |
| IRST to EDTEastern Daylight Time | UTC-4−7h30m | 01:30 |
| IRST to PDTPacific Daylight Time | UTC-7−10h30m | 22:30 |
| IRST to CDTCentral Daylight Time | UTC-5−8h30m | 00:30 |
| IRST to ACDTAustralian Central Daylight Time | UTC+10:30+7h | 16:00 |
| IRST to ACSTAustralian Central Standard Time | UTC+9:30+6h | 15:00 |
| Time zone | UTC · difference | 09:00 IRST = |
|---|---|---|
| IRST to ADTAtlantic Daylight Time | UTC-3−6h30m | 02:30 |
| IRST to AEDTAustralian Eastern Daylight Time | UTC+11+7h30m | 16:30 |
| IRST to AFSTAfghanistan Time | UTC+4:30+1h | 10:00 |
| IRST to AKDTAlaska Daylight Time | UTC-8−11h30m | 21:30 |
| IRST to AKSTAlaska Standard Time | UTC-9−12h30m | 20:30 |
| IRST to ALMTAlmaty Time | UTC+5+1h30m | 10:30 |
| IRST to AOEAnywhere on Earth | UTC-12−15h30m | 17:30 |
| IRST to AST-ARABIAArabia Standard Time | UTC+3−30m | 08:30 |
| IRST to ARTArgentina Time | UTC-3−6h30m | 02:30 |
| IRST to ASTAtlantic Standard Time | UTC-4−7h30m | 01:30 |
| IRST to AWSTAustralian Western Standard Time | UTC+8+4h30m | 13:30 |
| IRST to BDTBangladesh Time | UTC+6+2h30m | 11:30 |
| IRST to BRTBrasília Time | UTC-3−6h30m | 02:30 |
| IRST to CATCentral Africa Time | UTC+2−1h30m | 07:30 |
| IRST to CTCentral Time | UTC-5−8h30m | 00:30 |
| IRST to CESTCentral European Summer Time | UTC+2−1h30m | 07:30 |
| IRST to CHADTChatham Daylight Time | UTC+13:45+10h15m | 19:15 |
| IRST to CHASTChatham Standard Time | UTC+12:45+9h15m | 18:15 |
| IRST to CST-CHINAChina Standard Time | UTC+8+4h30m | 13:30 |
| IRST to CHSTChamorro Standard Time | UTC+10+6h30m | 15:30 |
Frequently asked questions
What is IRST?
IRST means Iran Standard Time. It is fixed at UTC+3:30 and does not change for daylight saving time.
Where is IRST's UTC offset used?
UTC+3:30 is used all year in Iran. 1 countries in our data have cities at this offset; local abbreviations can differ.
IRST vs UTC: what is the difference?
IRST = UTC+3:30, so 09:00 IRST = 05:30 UTC (on the corresponding UTC day).
Does IRST have daylight saving time?
No. IRST always means UTC+3:30. A region may switch to a different abbreviation, but this fixed label does not change its offset.