Midsummer's Eve means raising of traditional the Midsummer poles at several places on Kökar. In Karlby, Hellsö and Österbygge, poles are dressed with leaves and raised at different times of the day. The ceremony used to be in the evening, but many of the poles are now raised during the day.
The leaves are bound to garlands the same day or the night before, and the local inhabitants and tourists use to share this task.
The Midsummer poles of Kökar are different from those found on the mainland of Åland. Leaves of aspen are fastened on yarn ropes at regular intervals, and then bound as a checked pattern over the pole. Wreaths made of birch branches are fastened at the end of each of the five crossbars.