Oslo moves its clocks; India does not. From the last Sunday in March to the last Sunday in October, Oslo runs on Central European Summer Time and India is three and a half hours ahead; for the rest of the year the gap is four and a half hours. In 2026 the change back falls on 25 October.
For a vendor in India, both gaps are kind. An Oslo working day that starts at 08:00 begins at 11:30 or 12:30 IST, and most of it overlaps your own. The awkward hours are the Oslo afternoon and evening, which reach India after your desks close.
Plan for those hours in two ways. Let systems send what systems know: build status, incident alerts, delivery updates, each as a utility template triggered by the event. And let people answer what people must: a question sent at 17:00 in Oslo still has a window open until 17:00 the next day, time enough for your morning shift.