Time difference between Hanoi and San Antonio
Compare the current local time in Hanoi and San Antonio, see when your working hours overlap, and convert any specific hour between the two timezones.
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Convert a specific time
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Working-hours overlap
When Hanoi's 9:00–17:00 business hours overlap with San Antonio's.
Hanoi working hours
San Antonio working hours
Overlap (both working)
🇻🇳 Hanoi
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🇺🇸 San Antonio
Scheduling across Hanoi and San Antonio
Scheduling between Hanoi and San Antonio is hard. Their standard business hours do not overlap on the same day, with the smallest gap running 4 hours between San Antonio closing at 17:00 local and Hanoi opening at 09:00 local. Practical bridging slots: an early Hanoi start at 05:00 (catching San Antonio just at close, 17:00), or a late San Antonio call at 21:00 (catching Hanoi at opening, 09:00).
Quick reference
| 🇻🇳 Hanoi | 🇺🇸 San Antonio | In San Antonio it's… |
|---|---|---|
| 06:00 — Early morning | — | — |
| 09:00 — Start of work | — | — |
| 12:00 — Lunchtime | — | — |
| 15:00 — Mid-afternoon | — | — |
| 17:00 — End of work | — | — |
| 20:00 — Evening | — | — |
Daylight saving status
🇻🇳 Hanoi
Hanoi does not observe daylight saving time. The local offset is fixed year-round.
🇺🇸 San Antonio
Currently in CDT (daylight saving)
Clocks go back to CST
on Sunday 1 November 2026