Many of the languages of Luratia call a patch of cloudless sky ‘pure sky’. At any given time most of my planet, with the exception of the two poles, is almost continuously shrouded in cloud cover.
This cloud cover ranges from thick heavy blankets of clouds that stretch miles in height to the virtually imperceptible wispy-thin type of cloud that gives the illusion of cloudless sky.
When weather factors benevolently conspire to produce a pure sky condition, it is a significant event. A planetary broadcast is quick to dispatch the news and provide moment-by-moment detailed reports of the geographic location and the movement of a pure sky condition. So popular are pure skies that a Continent-supported broadcast, known as Pure Sky Global, devotes continuous coverage of the entire planet’s sky conditions.