Time in IST and BIOT
The time difference between Irish Standard Time (IST) and British Indian Ocean Time (BIOT) is 5 hours. British Indian Ocean Time is 5 hours ahead of Irish Standard Time.
This means 9am IST is 2pm BIOT and 5pm IST is 10pm BIOT.
Irish Standard Time
- The current local time in IST is 2:37 pm (July 18, 2026)
- IST time zone offset is UTC+01:00
British Indian Ocean Time
- The current local time in BIOT is 7:37 pm (July 18, 2026)
- BIOT time zone offset is UTC+06:00
How to convert Irish Standard Time to British Indian Ocean Time?
Add 5 hours to Irish Standard Time to get British Indian Ocean Time.
Time in IST
00:00
Time in BIOT
00:00
Use the slider above to convert Irish Standard Time to British Indian Ocean 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 | BIOT |
|---|---|
| 12am | 5am |
| 1am | 6am |
| 2am | 7am |
| 3am | 8am |
| 4am | 9am |
| 5am | 10am |
| 6am | 11am |
| 7am | 12pm |
| 8am | 1pm |
| 9am | 2pm |
| 10am | 3pm |
| 11am | 4pm |
| 12pm | 5pm |
| 1pm | 6pm |
| 2pm | 7pm |
| 3pm | 8pm |
| 4pm | 9pm |
| 5pm | 10pm |
| 6pm | 11pm |
| 7pm | 12am |
| 8pm | 1am |
| 9pm | 2am |
| 10pm | 3am |
| 11pm | 4am |