Time Difference Between Singapore and Hawaii Time
As of 12 October 2026, Hawaii Time is 18 hours behind Singapore. This difference is fixed: neither zone shifts its clocks against the other, so it holds all year.
Comparing other zones inside the country? See all seven US time zones side by side.
Tap either box to search any country or city.
Singapore
20:45
Mon, Oct 12, 2026
UTC+8 · Asia/Singapore
Hawaii Time, United States
-18h
02:45
Mon, Oct 12, 2026
UTC-10 · HST · Pacific/Honolulu
Hawaii Time is 18 hours behind Singapore.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Singapore | Monday, October 12, 2026 | Asia/Singapore | UTC+8 | Not observed |
| Hawaii Time | Monday, October 12, 2026 | HSTPacific/Honolulu | UTC-10 | Not observed |
Hawaii Time: Covers Hawaii. Stays at UTC-10 all year — Hawaii does not observe daylight saving time.
Hour by hour: Singapore to Hawaii Time
Every hour of today in Singapore and what it is in Hawaii Time. Highlighted rows fall inside Hawaii Time working hours (09:00–18:00).
| Singapore | Hawaii Time |
|---|---|
| 00:00 | 06:00prev day |
| 01:00 | 07:00prev day |
| 02:00 | 08:00prev day |
| 03:00 | 09:00prev day |
| 04:00 | 10:00prev day |
| 05:00 | 11:00prev day |
| 06:00 | 12:00prev day |
| 07:00 | 13:00prev day |
| 08:00 | 14:00prev day |
| 09:00 | 15:00prev day |
| 10:00 | 16:00prev day |
| 11:00 | 17:00prev day |
| Singapore | Hawaii Time |
|---|---|
| 12:00 | 18:00prev day |
| 13:00 | 19:00prev day |
| 14:00 | 20:00prev day |
| 15:00 | 21:00prev day |
| 16:00 | 22:00prev day |
| 17:00 | 23:00prev day |
| 18:00 | 00:00 |
| 19:00 | 01:00 |
| 20:00 | 02:00 |
| 21:00 | 03:00 |
| 22:00 | 04:00 |
| 23:00 | 05:00 |
Best time to call or meet
Overlapping working hours
09:00–12:00 in Singapore (15:00–18:00 in Hawaii Time)
Both places are inside 09:00–18:00 for 3 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
08:00–15:00 in Singapore (14:00–21:00 in Hawaii Time)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
Neither Singapore nor Hawaii Time changes its clocks, so the difference of 18 hours stays the same all year.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
Singapore and Hawaii Time: common questions
What is the time difference between Singapore and Hawaii Time?
Hawaii Time is 18 hours behind Singapore, and this does not change during the year because the difference between these two zones is fixed.
When it is 9:00 AM in Singapore, what time is it in Hawaii Time?
It is 03:00 PM in Hawaii Time, United States. Use the time field in the calculator above to check any other hour.
Is Hawaii Time ahead of or behind Singapore?
Hawaii Time is behind Singapore by 18 hours at the moment. In practical terms, the working day in Hawaii Time starts and ends later in Singapore terms.
Do Singapore and Hawaii Time observe daylight saving time?
Neither Singapore nor Hawaii Time observes daylight saving time, so the difference stays at 18 hours all year.
What is the best time to call Hawaii Time from Singapore?
Working hours overlap between 09:00 and 12:00 Singapore time, which is 15:00 to 18:00 in Hawaii Time. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for Singapore (UTC+8) and Hawaii Time, United States (UTC-10) were generated on Monday, October 12, 2026 UTC and refresh in your browser.