IRST — Iran Standard Time
IRST is Iran Standard Time, +03:30, used in Asia. In code, use Asia/Tehran rather than the abbreviation.
Iran Standard Time · Asia
03:46:00
Thursday, 13 August 2026
- abbreviation denotes
- +03:30
- in force right now
- UTC+03:30 (UTC+03:30)
- use in code
- Asia/Tehran
- next clock change
- none — fixed offset
UTC+3:30. Iran dropped daylight saving in 2022.
Right now this zone is on UTC+03:30, not IRST —
they are the same place at different times of year.
Use the IANA name, not the abbreviation
Python
from datetime import datetime
from zoneinfo import ZoneInfo
# right: an IANA zone carries the full history of rule changes
now = datetime.now(ZoneInfo("Asia/Tehran"))
print(now.isoformat(), now.tzname())
# wrong: an abbreviation is not resolvable, and a hard-coded offset
# silently rots the next time the rules change
# now = datetime.now(timezone(timedelta(hours=...))) # don'tIRST questions
What does IRST stand for?
IRST is Iran Standard Time, +03:30, used in Asia. The IANA zone to use in code is Asia/Tehran.
What time is it in IRST right now?
Iran Standard Time: 03:46 on Thursday (UTC+03:30).
Which IANA timezone should I use instead of IRST?
Asia/Tehran for Iran Standard Time. Date libraries cannot resolve bare abbreviations, and an abbreviation carries no daylight-saving history, so a stored offset silently rots when a government changes the rules.
Why does my computer show UTC+03:30 instead of IRST?
Because Asia/Tehran is currently on UTC+03:30 (UTC+03:30), its daylight-saving variant. IRST (+03:30) applies during the other half of the year. Both names refer to the same place, one hour apart.