Honolulu and Singapore working-hours overlap
On Monday, 28 September 2026, Honolulu is 18 hours behind Singapore — UTC-10:00 against UTC+08:00. They share no working hours that day at all: Honolulu works 19:00–03:00 UTC and Singapore works 01:00–09:00 UTC, and those two windows do not meet. Neither Honolulu nor Singapore changes clocks, so this window is the same all year.
Every figure on this page describes Monday, 28 September 2026 — a fixed day, not the day you are reading it. Working hours are 09:00–17:00 local time for both cities; change either, or pick another date, in the overlap calculator.
Shared working hours
No shared working hours on this date.
On this date the two working days do not meet, and none of the twelve months sampled for the year brings them together. Widening one side’s hours is what would change it; no other date will find a window that is not there.
Each city's working day
| City | Local hours | In UTC | Offset | Next clock change |
|---|---|---|---|---|
| Honolulu | 09:00–17:00 | 19:00–03:00 UTC | UTC-10:00 | No daylight saving |
| Singapore | 09:00–17:00 | 01:00–09:00 UTC | UTC+08:00 | No daylight saving |
Is there any overlap through the year?
Neither Honolulu nor Singapore changes clocks, so the gap between them is constant. In the twelve months sampled the two working days never meet, so there is no window to move.
| Month | Shared window | Length |
|---|---|---|
| 2026-10 | No shared hours | — |
| 2026-11 | No shared hours | — |
| 2026-12 | No shared hours | — |
| 2027-01 | No shared hours | — |
| 2027-02 | No shared hours | — |
| 2027-03 | No shared hours | — |
| 2027-04 | No shared hours | — |
| 2027-05 | No shared hours | — |
| 2027-06 | No shared hours | — |
| 2027-07 | No shared hours | — |
| 2027-08 | No shared hours | — |
| 2027-09 | No shared hours | — |
Questions
- Is there any time Honolulu and Singapore are both at work?
- Not on Monday, 28 September 2026. Honolulu works 19:00–03:00 UTC and Singapore works 01:00–09:00 UTC, and those windows do not overlap. Widening one side's hours or choosing another date is what changes that.
- How far apart are Honolulu and Singapore?
- On Monday, 28 September 2026, Honolulu is 18 hours behind Singapore — UTC-10:00 against UTC+08:00. Neither Honolulu nor Singapore changes clocks, so this window is the same all year.
- Does the overlap between Honolulu and Singapore change through the year?
- There is no month in the twelve months from Monday, 28 September 2026 when Honolulu and Singapore are both inside their working hours. Neither Honolulu nor Singapore changes clocks, so this window is the same all year.
Related city pairs
- Honolulu and San Francisco
- Honolulu and Denver
- Honolulu and Phoenix
- Honolulu and Mexico City
- Honolulu and Chicago
- Honolulu and Bogotá
Or read how overlap is calculated and the other questions people ask about scheduling across time zones.