Sơn Tây keeps UTC+7 all year. There is no daylight saving time, so the clock never changes.
Sơn Tây and your time
Sơn Tây at a glance
| Country | Vietnam |
|---|---|
| Region | Hanoi |
| Time zone | Asia/Ho_Chi_Minh |
| UTC offset now | UTC+7 |
| Daylight saving time | Not observed |
| Coordinates | 21.14° N, 105.51° E |
Time zone in Sơn Tây
The clocks in Sơn Tây follow Asia/Ho_Chi_Minh and keep UTC+7 through every season. No daylight saving time has been recorded here since 1970.
Sơn Tây is on the same time as the rest of Vietnam, including the capital, Hanoi.
Clock changes in Sơn Tây, 2026 and 2027
No clock changes are scheduled in Sơn Tây for 2026 or 2027.
Time difference between Sơn Tây and other cities
A 9:00 AM start in Sơn Tây is 9:00 PM (previous day) in New York, 1:00 PM in Sydney and 6:00 PM (previous day) in Los Angeles.
| City | Time now | Difference now | In January | In July | Shared office hours |
|---|---|---|---|---|---|
| New York (United States) | --:-- | 12 h behind | 12 h behind | 11 h behind | None |
| Los Angeles (United States) | --:-- | 15 h behind | 15 h behind | 14 h behind | None |
| London (United Kingdom) | --:-- | 7 h behind | 7 h behind | 6 h behind | 1 h |
| Paris (France) | --:-- | 6 h behind | 6 h behind | 5 h behind | 2 h |
| Dubai (United Arab Emirates) | --:-- | 3 h behind | 3 h behind | 3 h behind | 5 h |
| Mumbai (India) | --:-- | 1 h 30 min behind | 1 h 30 min behind | 1 h 30 min behind | 6 h 30 min |
| Singapore | --:-- | 1 h ahead | 1 h ahead | 1 h ahead | 7 h |
| Tokyo (Japan) | --:-- | 2 h ahead | 2 h ahead | 2 h ahead | 6 h |
| Sydney (Australia) | --:-- | 4 h ahead | 4 h ahead | 3 h ahead | 4 h |
| UTC | --:-- | 7 h behind | 7 h behind | 7 h behind | 1 h |
Sơn Tây never changes its clocks, but many of these cities do. Where the January and July columns disagree, the gap shifts when the other city moves to or from daylight saving time.
Shared office hours is the part of a 9 AM to 5 PM local working day that both cities have in common. Weekends are not taken into account.
Daylight in Sơn Tây
Today
| Sunrise | --:-- |
|---|---|
| Sunset | --:-- |
| Day length | -- |
| Solar noon | --:-- |
Close to the equator, days in Sơn Tây last between 10 hours 51 minutes and 13 hours 25 minutes, so evenings get dark at about the same time all year.
Daylight through the year in Sơn Tây
| Date | Sunrise | Sunset | Day length | |
|---|---|---|---|---|
| March equinox | March 20 | 6:02 AM | 6:09 PM | 12 h 7 min |
| June solstice | June 21 | 5:17 AM | 6:42 PM | 13 h 25 min |
| September equinox | September 23 | 5:47 AM | 5:54 PM | 12 h 7 min |
| December solstice | December 22 | 6:31 AM | 5:22 PM | 10 h 51 min |
When the sun is highest in Sơn Tây
Sơn Tây lies close to the centre of its time zone, so the sun is highest at about 12:00 PM on standard time, close to clock noon.
Places close to Sơn Tây
Every city below shares Sơn Tây’s clock.
| City | Distance | Time now | Difference |
|---|---|---|---|
| Ba Vì | 14 km (9 mi) | --:-- | Same time |
| Vĩnh Yên | 21 km (13 mi) | --:-- | Same time |
| Viet Tri | 23 km (14 mi) | --:-- | Same time |
| Phúc Yên | 23 km (14 mi) | --:-- | Same time |
| Hanoi | 37 km (23 mi) | --:-- | Same time |
| Sóc Sơn | 38 km (23 mi) | --:-- | Same time |
| Hòa Bình | 40 km (25 mi) | --:-- | Same time |
| Phú Thọ | 41 km (26 mi) | --:-- | Same time |
More cities in Vietnam
All time zones and cities in Vietnam
Plan around the time in Sơn Tây
- Convert a time to or from Sơn Tây: pick a date and time and see it in every city on your list.
- Add Sơn Tây to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Sơn Tây and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What time zone is Sơn Tây in?
Sơn Tây uses the Asia/Ho_Chi_Minh time zone, which is UTC+7 all year.
Does Sơn Tây use daylight saving time?
No. Sơn Tây stays on UTC+7 all year, so the time difference to places without daylight saving time never changes.
What is the time difference between Sơn Tây and New York?
Sơn Tây is 12 hours ahead of New York in January and 11 hours ahead of New York in July, because New York moves its clocks for daylight saving time and Sơn Tây does not.
Is Sơn Tây on the same time as Hanoi?
Yes. Sơn Tây and Hanoi both use UTC+7 right now.
How long is the longest day in Sơn Tây?
About 13 hours 25 minutes, around the June solstice. The shortest day, around the December solstice, has about 10 hours 51 minutes of daylight.
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.