| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | midnight sun | Polar countries | Phenomenon of the sun not setting during the summer solstice | 1 |
| 2 | midnight sun | Polar regions | Period of continuous daylight for days or months | 1 |
| 3 | midnight sun | polar regions | Period of time during summer when the sun does not set | 1 |