Healthy Sleep And Prayer Timings In Scandinavian Countries
Assalam-o-Alaikam. I am a student not a scholar, perhaps my opinion may be of some value. In Islam there are instances where prayer while walking or riding was allowed in special circumstances. Similarly in difficult situation it is allowed to combine Zuhar and Asar prayer and also Maghrib and Isha. So from the above it can be determined that in unusual circumstances there is flexibility in when and how prayer can be performed. So I see in the case of Scandinavian countries, it would be allowed to combine Maghrib, Isha and Fajar.
Nadeem sb Fajar cannot be combined. Magrib and Isha can be combined. In addtion to what Nadeem sb has said. Combining prayers without any good reason is not encouraged. Kindly refer to following video https://www.youtube.com/watch?v=WGROcqL_r4g