Time Difference Between Hawaii Time and Singapore
As of 31 August 2026, Singapore is 18 hours ahead of Hawaii Time. This difference is fixed: neither zone shifts its clocks against the other, so it holds all year.
Tap either box to search any country or city.
Hawaii Time, United States
12:34
Mon, Aug 31, 2026
UTC-10 · HST · Pacific/Honolulu
Singapore
+18h06:34
Tue, Sep 1, 2026
UTC+8 · Asia/Singapore
Singapore is 18 hours ahead of Hawaii Time.
When it is 12:34 in Hawaii Time, it is already the next day in Singapore.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Hawaii Time | Monday, August 31, 2026 | HSTPacific/Honolulu | UTC-10 | Not observed |
| Singapore | Tuesday, September 1, 2026 | Asia/Singapore | UTC+8 | Not observed |
Hawaii Time: Covers Hawaii. Stays at UTC-10 all year — Hawaii does not observe daylight saving time.
Hour by hour: Hawaii Time to Singapore
Every hour of today in Hawaii Time and what it is in Singapore. Highlighted rows fall inside Singapore working hours (09:00–18:00).
| Hawaii Time | Singapore |
|---|---|
| 00:00 | 18:00 |
| 01:00 | 19:00 |
| 02:00 | 20:00 |
| 03:00 | 21:00 |
| 04:00 | 22:00 |
| 05:00 | 23:00 |
| 06:00 | 00:00next day |
| 07:00 | 01:00next day |
| 08:00 | 02:00next day |
| 09:00 | 03:00next day |
| 10:00 | 04:00next day |
| 11:00 | 05:00next day |
| Hawaii Time | Singapore |
|---|---|
| 12:00 | 06:00next day |
| 13:00 | 07:00next day |
| 14:00 | 08:00next day |
| 15:00 | 09:00next day |
| 16:00 | 10:00next day |
| 17:00 | 11:00next day |
| 18:00 | 12:00next day |
| 19:00 | 13:00next day |
| 20:00 | 14:00next day |
| 21:00 | 15:00next day |
| 22:00 | 16:00next day |
| 23:00 | 17:00next day |
Best time to call or meet
Overlapping working hours
15:00–18:00 in Hawaii Time (09:00–12:00 in Singapore)
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
14:00–21:00 in Hawaii Time (08:00–15:00 in Singapore)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
Neither Hawaii Time nor Singapore 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.
Hawaii Time and Singapore: common questions
What is the time difference between Hawaii Time and Singapore?
Singapore is 18 hours ahead of Hawaii Time, and this does not change during the year because the difference between these two zones is fixed.
When it is 9:00 AM in Hawaii Time, what time is it in Singapore?
It is 03:00 AM in Singapore. Use the time field in the calculator above to check any other hour.
Is Singapore ahead of or behind Hawaii Time?
Singapore is ahead of Hawaii Time by 18 hours at the moment. In practical terms, the working day in Singapore starts and ends earlier in Hawaii Time terms.
Do Hawaii Time and Singapore observe daylight saving time?
Neither Hawaii Time nor Singapore observes daylight saving time, so the difference stays at 18 hours all year.
What is the best time to call Singapore from Hawaii Time?
Working hours overlap between 15:00 and 18:00 Hawaii Time time, which is 09:00 to 12:00 in Singapore. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for Hawaii Time, United States (UTC-10) and Singapore (UTC+8) were generated on Monday, August 31, 2026 UTC and refresh in your browser.