Time in IST and BST
The time difference between Irish Standard Time (IST) and Bougainville Standard Time (BST) is 10 hours. Bougainville Standard Time is 10 hours ahead of Irish Standard Time.
This means 9am IST is 7pm BST and 5pm IST is 3am BST (next day).
Irish Standard Time
- The current local time in IST is 2:40 pm (July 18, 2026)
- IST time zone offset is UTC+01:00
Bougainville Standard Time
- The current local time in BST is 12:40 am (July 19, 2026)
- BST time zone offset is UTC+11:00
How to convert Irish Standard Time to Bougainville Standard Time?
Add 10 hours to Irish Standard Time to get Bougainville Standard Time.
Time in IST
00:00
Time in BST
00:00
Use the slider above to convert Irish Standard Time to Bougainville 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
| IST | BST |
|---|---|
| 12am | 10am |
| 1am | 11am |
| 2am | 12pm |
| 3am | 1pm |
| 4am | 2pm |
| 5am | 3pm |
| 6am | 4pm |
| 7am | 5pm |
| 8am | 6pm |
| 9am | 7pm |
| 10am | 8pm |
| 11am | 9pm |
| 12pm | 10pm |
| 1pm | 11pm |
| 2pm | 12am |
| 3pm | 1am |
| 4pm | 2am |
| 5pm | 3am |
| 6pm | 4am |
| 7pm | 5am |
| 8pm | 6am |
| 9pm | 7am |
| 10pm | 8am |
| 11pm | 9am |