How is it possible to have a habitable planet where there are patterns of light and dark so erratic, it almost seems random (with a leaning towards greater periods of darkness than light)?
For example, you might have several hours of light followed by 20 hours of night, 5 hours of dawn, 10 hours of weak daylight, and then 3 hours of night, 12 hours of strong daylight, followed by 54 hours of darkest night?
What manner of strange things could be in a solar system to produce such erratic day/night periods? What "things vast enough" can block the main source/s of light?
Follow-Up Edits * Firstly, thank you for the welcomes; very much appreciated along with the responses.
Context of Question: For a fantasy world (read with Magic) more than Hard Sci-fi. This is more because I lack the astro-mathematical talent, have an interesting idea, but need to make sure it will pass casual muster.
Zxyrra - Re: seemingly random I suppose what I am seeking is a pattern so complex that it could not be correctly predicted in the mid to long term; even by a fairly sophisticated civilisation. It becomes a phenomenon where scholars, priests, prophets, and the everyday person all have different perspectives on what will happen. By saying "seemingly random", I suppose I am looking to lean upon a lack of certainty. Thank you for the link: I am a fan of GRRM's world. :)
Mikey - Re: temporary/stable I had not looked to pin this down in my mind; but I suppose having it as a several-centuries old phenomena creates an interesting tie-in with other aspects of the setting.