Asia/Ulaanbaatar is an IANA time zone used in Mongolia. It stays on UTC+8 all year.
Asia/Ulaanbaatar at a glance
| UTC offset now | UTC+8 |
|---|---|
| Standard time | UTC+8 |
| Used in | Mongolia |
How Asia/Ulaanbaatar keeps time
No clock changes are scheduled in Asia/Ulaanbaatar. The last one for daylight saving time was in 2016; since then the offset has been UTC+8 all year.
Recent and upcoming changes in Asia/Ulaanbaatar
| Date | Change | New offset |
|---|---|---|
| Saturday, March 28, 2015 | Clocks go forward 1 hour: 2:00 AM becomes 3:00 AM | UTC+9 |
| Friday, September 25, 2015 | Clocks go back 1 hour: 12:00 AM becomes 11:00 PM | UTC+8 |
| Saturday, March 26, 2016 | Clocks go forward 1 hour: 2:00 AM becomes 3:00 AM | UTC+9 |
| Friday, September 23, 2016 | Clocks go back 1 hour for good: 12:00 AM becomes 11:00 PM | UTC+8 |
The base offset of this zone changed in 1977, from UTC+7 to UTC+8. Old timestamps should be converted with the rule that applied at the time.
Countries and cities on Asia/Ulaanbaatar
Asia/Ulaanbaatar is used in Mongolia. These are the largest cities in our list that follow it.
Asia/Ulaanbaatar 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/Ulaanbaatar today. Their clock-change rules may differ.
- Asia/Brunei
- Asia/Hong_Kong
- Asia/Irkutsk
- Asia/Kuala_Lumpur
- Asia/Kuching
- Asia/Macau
- Asia/Makassar
- Asia/Manila
- Asia/Shanghai
- Asia/Singapore
- Asia/Taipei
- Australia/Perth
Using Asia/Ulaanbaatar in software
Store and send the zone as its IANA name, Asia/Ulaanbaatar, not as a fixed offset. A fixed offset such as UTC+8 gives the wrong result after the next clock change.
Show the current time in Asia/Ulaanbaatar:
// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'Asia/Ulaanbaatar', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('Asia/Ulaanbaatar'))
// PHP
(new DateTime('now', new DateTimeZone('Asia/Ulaanbaatar')))->format('c');
# Shell
TZ=Asia/Ulaanbaatar dateTools for time in Asia/Ulaanbaatar
- Convert a time to or from Asia/Ulaanbaatar: pick a date and time and see it in every city on your list.
- Add Ulaanbaatar to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Asia/Ulaanbaatar 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/Ulaanbaatar?
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.