Asia/Irkutsk is an IANA time zone used in Russia. It stays on UTC+8 all year.
Asia/Irkutsk at a glance
| UTC offset now | UTC+8 |
|---|---|
| Standard time | UTC+8 |
| Used in | Russia |
How Asia/Irkutsk keeps time
Asia/Irkutsk has stayed on UTC+8 since its last daylight saving period in 2010. Software that still applies an old rule will show the wrong time, so keep tz data up to date.
Recent and upcoming changes in Asia/Irkutsk
| Date | Change | New offset |
|---|---|---|
| Sunday, March 28, 2010 | Clocks go forward 1 hour: 2:00 AM becomes 3:00 AM | UTC+9 |
| Sunday, October 31, 2010 | Clocks go back 1 hour: 3:00 AM becomes 2:00 AM | UTC+8 |
| Sunday, March 27, 2011 | Standard offset changes from UTC+8 to UTC+9 | UTC+9 |
| Sunday, October 26, 2014 | Clocks go back 1 hour for good: 2:00 AM becomes 1:00 AM | UTC+8 |
The base offset of this zone changed in 2014, from UTC+9 to UTC+8. Old timestamps should be converted with the rule that applied at the time.
Countries and cities on Asia/Irkutsk
Asia/Irkutsk is used in Russia. These are the largest cities in our list that follow it.
Asia/Irkutsk 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) | --:-- | 13 h behind | 13 h behind | 12 h behind |
| Los Angeles (United States) | --:-- | 16 h behind | 16 h behind | 15 h behind |
| London (United Kingdom) | --:-- | 8 h behind | 8 h behind | 7 h behind |
| Paris (France) | --:-- | 7 h behind | 7 h behind | 6 h behind |
| Dubai (United Arab Emirates) | --:-- | 4 h behind | 4 h behind | 4 h behind |
| Mumbai (India) | --:-- | 2 h 30 min behind | 2 h 30 min behind | 2 h 30 min behind |
| Singapore | --:-- | Same time | Same time | Same time |
| Tokyo (Japan) | --:-- | 1 h ahead | 1 h ahead | 1 h ahead |
| Sydney (Australia) | --:-- | 3 h ahead | 3 h ahead | 2 h ahead |
| UTC | --:-- | 8 h behind | 8 h behind | 8 h behind |
Other zones on UTC+8 right now
These IANA zones show the same time as Asia/Irkutsk today. Their clock-change rules may differ.
- Asia/Brunei
- Asia/Hong_Kong
- Asia/Kuala_Lumpur
- Asia/Kuching
- Asia/Macau
- Asia/Makassar
- Asia/Manila
- Asia/Shanghai
- Asia/Singapore
- Asia/Taipei
- Asia/Ulaanbaatar
- Australia/Perth
Using Asia/Irkutsk in software
Use the zone name Asia/Irkutsk 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/Irkutsk:
// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'Asia/Irkutsk', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('Asia/Irkutsk'))
// PHP
(new DateTime('now', new DateTimeZone('Asia/Irkutsk')))->format('c');
# Shell
TZ=Asia/Irkutsk datePlan around the time in Asia/Irkutsk
- Convert a time to or from Asia/Irkutsk: pick a date and time and see it in every city on your list.
- Add Irkutsk to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Asia/Irkutsk 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/Irkutsk?
UTC+8, 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.