Midsummer officially falls on 24 June. However, in 1955 the date of the public holiday in Finland was moved to the first Saturday after 19 June.
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Midsummer Day marks the summer solstice, which is the culmination of summer, as well as a turning point when the days start to get shorter in the northern hemisphere.
During this period the nights are light and short, while in regions that lie to the north of the Arctic Circle, the sun never falls below the horizon for several weeks. In Nuorgam, located at the northernmost point in Finland, the sun never sets between the mid portion of May and the end of July.
When Midsummer Day arrives, for many it marks the beginning of their summer holiday, which typically lasts for four weeks.