Endless Daylight: A property of more than a few worlds in the Empire. Some, like Eurymir, because they’re tide-locked, and the noon pole always points at the sun. A similar situation applies to the hexterranes of Coricál Ailék, which are oriented such that “up” is always sunward, and the danglehabs of Esilmúr, in which down is always sunward.
In other cases, it’s because the world inhabits a binary system. Eliéra, for example, has this periodically – in a manner of speaking – because for half the year, the summer, it is located between the two suns, and as such each side of the world receives some insolation. (Although, obviously, not identical – it still has a day-night cycle; it’s just that it alternates between full daylight and a red-tinged twilight that’s bright enough to read by, somewhat more so than a full moon.)