Singapore zone
GMT+8 (GMT+8)
Honolulu zone
HST (GMT-10)
Difference
18 hours behind Singapore
Business overlap
2h (9-5 windows)
Working hours overlap
Each cell is one hour in Singapore. Filled cells mark when 9 AM – 5 PM in Singapore and Honolulu both apply.
2 hours per day
- Singapore
- GMT+8
- Honolulu
- GMT-10
- Difference
- -18h
- Business overlap
- 2h
Hour-by-hour conversion
Each row shows the matching local time in Honolulu for an hour in Singapore.
| Singapore | Honolulu | Day | Window |
|---|---|---|---|
| 12:00 AM | 6:00 AM | previous day | — |
| 1:00 AM | 7:00 AM | previous day | — |
| 2:00 AM | 8:00 AM | previous day | — |
| 3:00 AM | 9:00 AM | previous day | — |
| 4:00 AM | 10:00 AM | previous day | — |
| 5:00 AM | 11:00 AM | previous day | — |
| 6:00 AM | 12:00 PM | previous day | — |
| 7:00 AM | 1:00 PM | previous day | — |
| 8:00 AM | 2:00 PM | previous day | — |
| 9:00 AM | 3:00 PM | previous day | Both 9-5 |
| 10:00 AM | 4:00 PM | previous day | Both 9-5 |
| 11:00 AM | 5:00 PM | previous day | — |
| 12:00 PM | 6:00 PM | previous day | — |
| 1:00 PM | 7:00 PM | previous day | — |
| 2:00 PM | 8:00 PM | previous day | — |
| 3:00 PM | 9:00 PM | previous day | — |
| 4:00 PM | 10:00 PM | previous day | — |
| 5:00 PM | 11:00 PM | previous day | — |
| 6:00 PM | 12:00 AM | same day | — |
| 7:00 PM | 1:00 AM | same day | — |
| 8:00 PM | 2:00 AM | same day | — |
| 9:00 PM | 3:00 AM | same day | — |
| 10:00 PM | 4:00 AM | same day | — |
| 11:00 PM | 5:00 AM | same day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 9:00 AM – 11:00 AM in Singapore time. That gives you 2 hours per workday for live meetings.
Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.
About converting Singapore time to Honolulu time
Singapore follows the Asia/Singapore time zone (currently GMT+8, GMT+8), while Honolulu follows Pacific/Honolulu (currently HST, GMT-10). Honolulu is 18 hours behind Singapore right now.
Neither city observes daylight saving time, so the offset between them is the same all year.
Reverse this conversion
Honolulu to Singapore
Open the converter
Plan a meeting between Singapore and Honolulu
More conversions from Singapore
Frequently asked questions
- How many hours is Singapore from Honolulu?
- Honolulu is 18 hours behind Singapore right now.
- What time is 9:00 AM Singapore in Honolulu?
- 9:00 AM in Singapore is 3:00 PM (previous day) in Honolulu.
- What time is 5:00 PM Singapore in Honolulu?
- 5:00 PM in Singapore is 11:00 PM (previous day) in Honolulu.
- When do Singapore and Honolulu business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 2 hours, roughly from 9:00 AM to 11:00 AM in Singapore time.
- Does daylight saving time change the difference between Singapore and Honolulu?
- Neither Singapore nor Honolulu observes daylight saving time, so the offset between them is constant year-round.
Local time page
Time in Singapore
Local time page
Time in Honolulu