Hanoi HoustonTime Converter
Hanoi (ICT, UTC+7) is currently 12 hours ahead of Houston (CDT, UTC−5). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Hanoi, it's the previous day in Houston.
Hanoi (ICT) runs 12 hours ahead of Houston (CST/CDT). A 9-to-5 workday on one side lands in the other side's evening or night, so the two cities share almost no normal working hours — edge-of-day calls are the trick.
- Time difference
- −12h 00m
- Hanoi
- UTC+7
- Houston
- UTC−5
- Best call window
- Outside 9–6
Hanoi to Houston conversion table
The next 12 hours in Hanoi and the matching local time in Houston. The current hour is highlighted; drag the converter's slider and the table follows.
| Hanoi · ICT | Houston · CDT |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Best time to meet between Hanoi & Houston
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
Daylight saving shifts this gap by up to 1 hour
The difference between Hanoi and Houston swings between 13 and 12 hours across the year as each side starts or ends daylight saving. Hanoi does not observe daylight saving time. Clocks in Houston move back 1 hour to CST (UTC−6) on Sunday, November 1, 2026. This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair — every combination is a live tool, not an article.
From Hanoi
To Houston
One source of truth — for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am Hanoi time in Houston?", it can cite the exact, DST-aware result — not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "Hanoi → Houston",
"url": "https://worldclock.pro/en/convert/hanoi-to-houston",
"from": {
"name": "Hanoi",
"type": "city",
"abbreviation": "ICT",
"daylightAbbreviation": null,
"iana": "Asia/Bangkok",
"standardUtcOffset": "+07:00",
"daylightUtcOffset": null,
"referenceCity": "Hanoi"
},
"to": {
"name": "Houston",
"type": "city",
"abbreviation": "CST",
"daylightAbbreviation": "CDT",
"iana": "America/Chicago",
"standardUtcOffset": "-06:00",
"daylightUtcOffset": "-05:00",
"referenceCity": "Houston"
},
"currentDifferenceMinutes": -720,
"possibleDifferencesMinutes": [
-780,
-720
],
"note": "Between the regions that use these zones the difference is 13 and 12 hours across the year, depending on daylight saving on each side. The clocks on this page show the named zones themselves, which are fixed."
}
Frequently asked questions
What is the time difference between Hanoi and Houston?
Hanoi is currently 12 hours ahead of Houston. Hanoi is on ICT (UTC+7) and Houston is on CDT (UTC−5). The difference can change when either side starts or ends daylight saving time.
Is Houston ahead of or behind Hanoi?
Houston is currently 12 hours behind Hanoi.
When it is 9:00 AM in Hanoi, what time is it in Houston?
When it is 9:00 AM on a Monday in Hanoi, it is 9:00 PM the previous day in Houston.
Do Hanoi and Houston observe daylight saving time?
Hanoi does not observe daylight saving time. Clocks in Houston move back 1 hour to CST (UTC−6) on Sunday, November 1, 2026.
How do I convert Hanoi time to Houston time?
Subtract 12 hours from any time in Hanoi to get the time in Houston. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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