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Easter (påsk) is celebrated in Sweden. The belief in witches travelling to Blåkulla (Blue Hill) on Maundy Thursday (originally for a sabbath with the Devil) is honoured by children dressing up as witches (påskkärring), knocking the doors in the neighbourhoods requesting treats (much like the trick or treat during Halloween in many English-speaking countries).
Blue Virgin Island, Blå Jungfrun, or "Blåkulla", is a Swedish island in the Baltic Sea. More precisely, it is situated in Kalmar Strait, between the provinces Småland and Öland. Administratively, it belongs to the municipality Oskarshamn. It is uninhabited and has an area of only about 0.7 km², though it rises 86 metres above sea level.
The island plays an important role in Swedish folklore, where it is viewed as an evil and magical place. The name Blå Jungfrun (Blue Virgin) was originally used by sailors to avoid provoking the evil spirits who dwelt on the island.