The United States and Vietnam: how many working hours a remote team actually shares
Between the United States and Vietnam the working days do not overlap at all: one side's 09:00–18:00 is over before the other side starts.
City by city
Shared hours of a 09:00–18:00 working day, computed for September 10, 2026.
Is that enough?
The staffing rule of thumb is 2–3 shared hours for engineering, 4–6 for sales and support. Against the best city pairing in this corridor:
| Engineering, async-friendly (2–3 h) | none | does not work without someone shifting hours |
|---|---|---|
| Sales and support (4–6 h) | none | does not work without someone shifting hours |
Working out what those hours cost? The meeting-cost calculator prices a recurring call in the United States and in Vietnam. costof.autofract.com
What daylight saving does to it
The gap between these two countries is not constant. Over the next twelve months it takes these values:
| From | to | Difference | Shared working hours |
|---|---|---|---|
| September 10, 2026 | October 31, 2026 | +11 h | none |
| November 1, 2026 | March 13, 2027 | +12 h | none |
| March 14, 2027 | October 14, 2027 | +11 h | none |
The city pairs behind these numbers
Offsets and daylight-saving rules come from the IANA time zone database through the standard Intl API — the same source the board uses, so nothing here is a hand-written offset table. Working hours are 09:00–18:00 local on both sides unless you change them on the board. City names and coordinates: GeoNames (CC BY 4.0).
Computed on September 10, 2026 · About