I've been waiting for my first prescription to arrive. The Finnish postal service is incredibly inefficient with incoming international mail.
For what I know, they still operate by putting the letters in huge piles. And then they empty the piles one at a time, starting from the oldest pile. But they empty it from the top towards the bottom, so if my letter happened to be the first letter in its pile, it will take one whole month for the pile to get emptied so that the letter that ended up forming its bottom gets delivered onwards.
I've seen tracked letters continue from the sorting facility near the Helsinki-Vantaa airport in just 1½ days, and I've seen them hang there for 1½ months. You can never know. Depends on what part of the pile the letter ends up at. And this letter is not even tracked, so I have even less clue of where it's wobbling at the moment. Hopefully already being sorted for delivery tomorrow? Maybe? Please?