Time Difference US and Vietnam
Ho Chi Minh City is 11 hours ahead of New York. Because the clocks do not change on the same days, the difference is sometimes 12 hours – the table shows when. When it is 12:00 in New York, it is 23:00 in Ho Chi Minh City.
Time difference US and Vietnam to the end of 2027
| Period | Difference |
|---|---|
| 30 Sept 2026 – 1 Nov 2026 | +11 h |
| 1 Nov 2026 – 14 Mar 2027 | +12 h |
| 14 Mar 2027 – 7 Nov 2027 | +11 h |
| 7 Nov 2027 – 31 Dec 2027 | +12 h |
Convert the time: New York → Ho Chi Minh City
| New York | Ho Chi Minh City (+11 h) | Ho Chi Minh City (+12 h) |
|---|---|---|
| 00:00 | 11:00 | 12:00 |
| 02:00 | 13:00 | 14:00 |
| 04:00 | 15:00 | 16:00 |
| 06:00 | 17:00 | 18:00 |
| 08:00 | 19:00 | 20:00 |
| 10:00 | 21:00 | 22:00 |
| 12:00 | 23:00 | 00:00 (+1) |
| 14:00 | 01:00 (+1) | 02:00 (+1) |
| 16:00 | 03:00 (+1) | 04:00 (+1) |
| 18:00 | 05:00 (+1) | 06:00 (+1) |
| 20:00 | 07:00 (+1) | 08:00 (+1) |
| 22:00 | 09:00 (+1) | 10:00 (+1) |
(+1) = next day, (−1) = previous day. One column for each difference in the table above.
Time zones in US
| Time zone (example city) | January 2027 | July 2027 |
|---|---|---|
| Eastern Time (New York) | ±0 h | ±0 h |
| Central Time (Chicago) | −1 h | −1 h |
| Mountain Time (Denver) | −2 h | −2 h |
| Mountain Standard Time (Phoenix) | −2 h | −3 h |
| Pacific Time (Los Angeles) | −3 h | −3 h |
| Alaska Time (Anchorage) | −4 h | −4 h |
| Hawaii-Aleutian Standard Time (Honolulu) | −5 h | −6 h |
Clock changes in 2027
- US: 14 March (+1 h) and 7 November (−1 h).
- Vietnam: no clock change.
Calculate the time difference between any two countries
How it is calculated
We use the IANA time zone database (tzdata), which browsers and operating systems use as well. For every day the UTC offset of both main zones (New York and Ho Chi Minh City) is looked up; the difference only changes when one of the countries changes its clocks. In the UK and the EU that happens on the last Sunday of March and October at 01:00 UTC; in the US on the second Sunday of March and the first Sunday of November (15 U.S.C. § 260a).
Limits: countries can change their time rules at short notice; this page shows the time zone database as of the update date. For countries with several time zones the main zone is used; the others are listed in the time zone table.
Frequently asked questions
How many hours is the time difference between the US and Vietnam?
Ho Chi Minh City is 11 hours ahead of New York. At times it is 12 hours, because the clocks change on different days.
What time is it in Ho Chi Minh City when it is 12 noon in New York?
23:00 – as long as the difference is 11 hours. The conversion table shows every hour.
When does the time difference change?
Up to the end of 2027 on these dates: 1 November 2026: +12 h; 14 March 2027: +11 h; 7 November 2027: +12 h.
Does Vietnam observe daylight saving time?
No, Ho Chi Minh City has no clock change in 2027, so the difference to New York only changes when New York changes its clocks.
Time difference US – other countries
Sources
- IANA Time Zone Database (tzdata)
- ECMA-402 – Intl.DateTimeFormat, option timeZone
- EUR-Lex – 2000/84/EC (summer time / Sommerzeit)
- 15 U.S.C. § 260a – daylight saving time in the United States (Cornell LII)
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