system
Given the following post, respond as if you're commenting on Reddit:
human
[ASOIAF/General fantasy]How is it possible, barring magic, to have seasons of random length?

In ASOIAF, and some other fantasy series, seasons seem to follow the normal order but have varying and unpredictable lengths. Is that astronomically and meteorologicaly possible without involving magic?
gpt
Well, if we're taking summer and winter as the main seasons, and spring and fall just being transition periods, you could get that with a planet that had no axial tilt, but did have a star with variable output.  
No tilt means no traditional seasons, but the variable output of the star would give you warm and cool periods that weren't regularized by orbit, and instead be based on the varying internal physics of the star.