Time Difference: Istanbul vs Oslo
Istanbul
11:05:40 AM TRT
Sunday, October 25, 2026
2h
2h
Oslo
9:05:40 AM CET
Sunday, October 25, 2026
Oslo is 2 hours behind Istanbul.
Quick Reference
- Istanbul
- TRT (GMT+3)
No Daylight Saving Time
- Oslo
- CET (GMT+1)
CEST starts on Mar 28, 2027
Frequently Asked Questions
- What is the time difference between Istanbul and Oslo?
- Oslo is 2 hours behind Istanbul.
- When is the best time to call from Istanbul to Oslo?
- The best time to call is during overlapping business hours (9 AM – 5 PM) in both cities. Use the interactive converter on this page to visually compare hours side by side.
- Does the time difference change with daylight saving time?
- The time difference may change when either city enters or exits daylight saving time. Istanbul uses TRT and Oslo uses CET.