midnight sun
natural phenomenon when daylight lasts for more than 24 hours, occuring only inside or close to the polar circles
en-GB/ˈmɪdnaɪt ˈsʌn/
en-US/ˈmɪdˌnaɪt sən/
natural phenomenon when daylight lasts for more than 24 hours, occuring only inside or close to the polar circles