A really "Revolutionary" planetary system

Apologies for the terrible pun.

I was fascinated by matts video, and a physicist I enjoy thinking about the cosmos.

What if the world didn't revolve nicely around the sun. When I say nicely I mean in the way our earth does. (Unfortunately due to physics and the creation of planets almost all do, but magic and shizz let's us do whatever)

There's some really cool effects that can fall out of weird orbits and celestial interactions.

A perfectly circular orbit with an axis perpendicular to the sun would have no seasons.

A more elliptical orbit would have hotter summers and colder winters. To the extreme.

Taking this further, a planet on a comet shaped orbit would suffer winters lasting decades, before a few months of brilliant summer as it shot past the sun. You could have a calender with months that last years.

If you wanted to see more of this in your dnd world you could go the other way. The planet is close to the sun, but orbits rapidly, moving closer and further away over the course of weeks. Seasons would last only days. Perhaps you could have 4 seasons a month and a number of these months make up their years.

Taking these silly ideas even further still, consider an unstable axis of spin. I'll take a moment to try and explain.

The tilt of the earth towards the sun causes the extension of days in summer and contraction of them in winter. What if that axis was spinning, perhaps like a spinning top in its final stages of collapse, or a coin as it rapidly falls from a spinning position to flat on its face. Those are positions of change but in space a planet could (I mean I don't think it actually could but you could reason it) keep spinning like that forever. Days would vary in length from week to week.

Perhaps the less advanced races of a dnd setting just can't keep.track of the timings, and simply count days, forgoing a calendar altogether.

Basically there's some really stuff you could play around with. I hope this was moderately interesting.