They can never explain anything, let alone seasons and sunrises/sunsets.
Nor can they explain why the sun, which is apparently 3000km above our heads, shines like a spotlight. They can't explain this mechanism, apparently.
Frankly, they can't really explain anything and for one simple reason: nothing about their model fits reality/observation. Absolutely nothing. That is why you see their thoughts/opinions on their model change frequently- after all, you can't ever really get a square peg to fit into a round hole.
If FE's couldn't utter the words indoctrination, lies, conspiracy or bullshit, they'd all be permanently speechless.