> As Svalbard is located north of the Arctic Circle, it experiences midnight sun during summer and polar night during winter. At the 74° parallel north, the midnight sun lasts 99 days and polar night 84 days, while the respective figures at the 81° parallel north are 141 and 128 days.[11] In Longyearbyen, midnight sun lasts from 20 April until 23 August, and polar night lasts from 26 October until 15 February.
https://en.wikipedia.org/wiki/Time_in_Svalbard#Geography_and...
If you desire to experience such polar wackiness in a less isolated location, one place I can definitely recommend is the mainland Norwegian city of Tromsø.