1920, Illustrated London News, volume 67, page 1065:
Eight midnight suns. I photographed the sun every twenty minutes, beginning at 11 p.m., and finishing at 1:20 a.m.
2010, Roger Norum, The Rough Guide to Finland, [1]:
Fox fires and midnight suns
2011, Dan Burstein, Arne de Keijzer, and John-Henri Holmberg, The Tattooed Girl, page 114:
Crime is not the first thing that comes to mind at the thought of Sweden or Norway. More likely it's fantastic fjords, social democracies, IKEA, Saab, H&M, saunas, pine forests, white interiors, Ingmar Bergman, dark winters, midnight suns....