Honolulu and Sydney working-hours overlap
On Monday, 28 September 2026, Honolulu is 20 hours behind Sydney — UTC-10:00 against UTC+10:00. They share no working hours that day at all: Honolulu works 19:00–03:00 UTC and Sydney works 23:00–07:00 UTC, and those two windows do not meet. Honolulu does not change clocks at all. Sydney changes clocks on Sunday, 4 October 2026, and the gap between them goes from 20 hours to 21 hours.
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 |
| Sydney | 09:00–17:00 | 23:00–07:00 UTC | UTC+10:00 | UTC+10:00 → UTC+11:00, 4 Oct 2026 |
Is there any overlap through the year?
Sydney changes clocks on Sunday, 4 October 2026, and Honolulu never does, so the gap between them moves only when Sydney's clocks do. 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 Sydney are both at work?
- Not on Monday, 28 September 2026. Honolulu works 19:00–03:00 UTC and Sydney works 23:00–07:00 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 Sydney?
- On Monday, 28 September 2026, Honolulu is 20 hours behind Sydney — UTC-10:00 against UTC+10:00. Honolulu does not change clocks at all. Sydney changes clocks on Sunday, 4 October 2026, and the gap between them goes from 20 hours to 21 hours.
- Does the overlap between Honolulu and Sydney change through the year?
- There is no month in the twelve months from Monday, 28 September 2026 when Honolulu and Sydney are both inside their working hours. Honolulu does not change clocks at all. Sydney changes clocks on Sunday, 4 October 2026, and the gap between them goes from 20 hours to 21 hours.
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.