Time in BST and HST
The time difference between Bougainville Standard Time (BST) and Hawaii–Aleutian Standard Time (HST) is 21 hours. Hawaii–Aleutian Standard Time is 21 hours behind Bougainville Standard Time.
This means 9am BST is 12pm HST (previous day) and 5pm BST is 8pm HST (previous day).
Bougainville Standard Time
- The current local time in BST is 12:38 am (July 19, 2026)
- BST time zone offset is UTC+11:00
Hawaii–Aleutian Standard Time
- The current local time in HST is 11:38 pm (July 18, 2026)
- HST time zone offset is UTC-10:00
How to convert Bougainville Standard Time to Hawaii–Aleutian Standard Time?
Subtract 21 hours from Bougainville Standard Time to get Hawaii–Aleutian Standard Time.
Time in BST
00:00
Time in HST
00:00
Use the slider above to convert Bougainville Standard Time to Hawaii–Aleutian Standard Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| BST | HST |
|---|---|
| 12am | 3am |
| 1am | 4am |
| 2am | 5am |
| 3am | 6am |
| 4am | 7am |
| 5am | 8am |
| 6am | 9am |
| 7am | 10am |
| 8am | 11am |
| 9am | 12pm |
| 10am | 1pm |
| 11am | 2pm |
| 12pm | 3pm |
| 1pm | 4pm |
| 2pm | 5pm |
| 3pm | 6pm |
| 4pm | 7pm |
| 5pm | 8pm |
| 6pm | 9pm |
| 7pm | 10pm |
| 8pm | 11pm |
| 9pm | 12am |
| 10pm | 1am |
| 11pm | 2am |