ZOMG FINISHED (OR IS IT FINNISHED? HAHA!).
Again, I doubt short sleeves were period for anyone in the Norse culture, but they also didn't have swampy ass Cape Cod to deal with in June or Western Pennsylvania in August. Plus I already have a long sleeve tunic dress. It's not trimmed, but it works.
You'll notice that the gores on the dress are brown and not green...I fucked up cutting.
So I did the most period thing, and that was throw in whatever fabric I had.