Asia/Tehran is an IANA time zone used in Iran. It stays on UTC+3:30 all year.
Asia/Tehran at a glance
| UTC offset now | UTC+3:30 |
|---|---|
| Standard time | UTC+3:30 |
| Used in | Iran |
How Asia/Tehran keeps time
No clock changes are scheduled in Asia/Tehran. The last one for daylight saving time was in 2022; since then the offset has been UTC+3:30 all year.
Recent and upcoming changes in Asia/Tehran
| Date | Change | New offset |
|---|---|---|
| Monday, March 22, 2021 | Clocks go forward 1 hour: 12:00 AM becomes 1:00 AM | UTC+4:30 |
| Tuesday, September 21, 2021 | Clocks go back 1 hour: 12:00 AM becomes 11:00 PM | UTC+3:30 |
| Tuesday, March 22, 2022 | Clocks go forward 1 hour: 12:00 AM becomes 1:00 AM | UTC+4:30 |
| Wednesday, September 21, 2022 | Clocks go back 1 hour for good: 12:00 AM becomes 11:00 PM | UTC+3:30 |
The base offset of this zone changed in 1978, from UTC+4 to UTC+3:30. Old timestamps should be converted with the rule that applied at the time.
Countries and cities on Asia/Tehran
Asia/Tehran is used in Iran. These are the largest cities in our list that follow it.
Asia/Tehran compared with other time zones
Differences change during the year when one side moves to or from daylight saving time, so the table shows January and July separately.
| City | Time now | Difference now | In January | In July |
|---|---|---|---|---|
| New York (United States) | --:-- | 8 h 30 min behind | 8 h 30 min behind | 7 h 30 min behind |
| Los Angeles (United States) | --:-- | 11 h 30 min behind | 11 h 30 min behind | 10 h 30 min behind |
| London (United Kingdom) | --:-- | 3 h 30 min behind | 3 h 30 min behind | 2 h 30 min behind |
| Paris (France) | --:-- | 2 h 30 min behind | 2 h 30 min behind | 1 h 30 min behind |
| Dubai (United Arab Emirates) | --:-- | 30 min ahead | 30 min ahead | 30 min ahead |
| Mumbai (India) | --:-- | 2 h ahead | 2 h ahead | 2 h ahead |
| Singapore | --:-- | 4 h 30 min ahead | 4 h 30 min ahead | 4 h 30 min ahead |
| Tokyo (Japan) | --:-- | 5 h 30 min ahead | 5 h 30 min ahead | 5 h 30 min ahead |
| Sydney (Australia) | --:-- | 7 h 30 min ahead | 7 h 30 min ahead | 6 h 30 min ahead |
| UTC | --:-- | 3 h 30 min behind | 3 h 30 min behind | 3 h 30 min behind |
Using Asia/Tehran in software
Use the zone name Asia/Tehran rather than an abbreviation or a fixed offset. Abbreviations can mean several zones, and offsets ignore future clock changes.
Show the current time in Asia/Tehran:
// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'Asia/Tehran', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('Asia/Tehran'))
// PHP
(new DateTime('now', new DateTimeZone('Asia/Tehran')))->format('c');
# Shell
TZ=Asia/Tehran datePlan around the time in Asia/Tehran
- Convert a time to or from Asia/Tehran: pick a date and time and see it in every city on your list.
- Add Tehran to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Asia/Tehran and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What is the UTC offset of Asia/Tehran?
UTC+3:30, all year.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.