Finland's summertime period of 'nightless nights' began in the far north of the country on Saturday 16 May.
People living in Utsjoki, Finland's northernmost municipality, along with other towns in northern Lapland, will again experience more than two months without the sun dipping below the horizon.
The nightless night phenomenon is common in areas above the Arctic Circle, but people further south also experience it.
The southern limit of nightless nights stretches from Kemi in south-western Finnish Lapland to Kuusamo in the north-east (about 100 km below the Arctic Circle) though the duration is considerably shorter in these more southerly locations.
More southern areas of the country will also experience significantly extended daylight throughout the summer period.
