Jakarta is 5 hours ahead of Oslo
Best overlap: 8:00 AM to 1:00 PM in Oslo is 1:00 PM to 6:00 PM in Jakarta.
Keep meetings inside 8:00 AM to 1:00 PM in Oslo — that maps to 1:00 PM to 6:00 PM in Jakarta. You share roughly 5 hours a day. That's enough for regular meetings, but treat the window as prime time and guard it. Remember that Oslo shifts for daylight saving and Jakarta doesn't, so recalculate the overlap after each clock change.