Offset
The time difference between Hawaii Time and Singapore Time is 18 hours.
Hawaii Time (HST) is behind Singapore Time (SGT).
HST: UTC-10
SGT: UTC+8
Neither Hawaii Time nor Singapore Time is currently observing daylight saving time.
When to schedule
Business-hours overlap: 3 PM–5 PM in Hawaii Time (9 AM–11 AM the next day in Singapore Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 4:00 PM Hawaii Time (10:00 AM Singapore Time).
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
Singapore
- New Year's DayThu, Jan 1
- Chinese New YearTue, Feb 17
- Chinese New YearWed, Feb 18
- Hari Raya PuasaFri, Mar 20
- Good FridayFri, Apr 3
- Labour DayFri, May 1
- Hari Raya Haji (Tentative Date)Wed, May 27
- National DayMon, Aug 10
- DeepavaliMon, Nov 9
- Christmas DayFri, Dec 25
About these zones
Hawaii Time is also known as HST. To call United States, dial +1.
Singapore Time is also known as SGT. To call Singapore, dial +65.
Singapore Time is approximately 6,700 miles west of Hawaii Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| HST | SGT | Day |
|---|---|---|
| 12:00 am | 6:00 pm | Same day |
| 1:00 am | 7:00 pm | Same day |
| 2:00 am | 8:00 pm | Same day |
| 3:00 am | 9:00 pm | Same day |
| 4:00 am | 10:00 pm | Same day |
| 5:00 am | 11:00 pm | Same day |
| 6:00 am | 12:00 am | +1 day |
| 7:00 am | 1:00 am | +1 day |
| 8:00 am | 2:00 am | +1 day |
| 9:00 am | 3:00 am | +1 day |
| 10:00 am | 4:00 am | +1 day |
| 11:00 am | 5:00 am | +1 day |
| 12:00 pm | 6:00 am | +1 day |
| 1:00 pm | 7:00 am | +1 day |
| 2:00 pm | 8:00 am | +1 day |
| 3:00 pm | 9:00 am | +1 day |
| 4:00 pm | 10:00 am | +1 day |
| 5:00 pm | 11:00 am | +1 day |
| 6:00 pm | 12:00 pm | +1 day |
| 7:00 pm | 1:00 pm | +1 day |
| 8:00 pm | 2:00 pm | +1 day |
| 9:00 pm | 3:00 pm | +1 day |
| 10:00 pm | 4:00 pm | +1 day |
| 11:00 pm | 5:00 pm | +1 day |
Daylight saving time
Neither Hawaii Time nor Singapore Time observes daylight saving time. The offset between these zones remains constant year-round.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:50 AM
- Sunset
- 7:12 PM
- Day length
- 13h 22m
- Sunrise
- 6:58 AM
- Sunset
- 7:10 PM
- Day length
- 12h 12m
Daylight overlap: 6h 14m — 12:58 PM–7:12 PM in Hawaii Time (6:58 AM–1:12 PM in Singapore Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Hawaii Time
Cities in Singapore Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Hawaii Time
- HNL
Airports in Singapore Time
- SIN
Related conversions
Common conversions
- What is 9:00 am HST in SGT?
- 9:00 am HST is 3:00 am SGT, the next day.
- What is 12:00 pm HST in SGT?
- 12:00 pm HST is 6:00 am SGT, the next day.
- What is 12:30 pm HST in SGT?
- 12:30 pm HST is 6:30 am SGT, the next day.
- What is 2:00 pm HST in SGT?
- 2:00 pm HST is 8:00 am SGT, the next day.
- What is 5:00 pm HST in SGT?
- 5:00 pm HST is 11:00 am SGT, the next day.
- What is 11:30 pm HST in SGT?
- 11:30 pm HST is 5:30 pm SGT, the next day.