'Midsommar' (midsummer) is celebrated in many parts of the world as the longest day of the year. In the northern parts of Sweden, the sun actually never sets and there is daylight both night and day. If you are a girl, here is what to do on Midsummer Eve according to Swedish folklore. Pick seven kinds of flowers from a fork in the road, climb over nine stone walls, then go to sleep - all without saying a word to anyone. Then you will dream about your husband to-be. It is worth trying!