"Ah," Judge Syntax said, a small smile playing on his lips. "There is the exception. If you are writing a poem—'Old Man Winter howled at the door'—then, and only then, do you get your capitalization. In the realm of creative writing, you may be elevated. But in standard prose, you remain humble."

In summary, unless you're using a season in a title, personifying it, or in a specific cultural or historical context, it's generally not necessary to capitalize it.

At the defense table sat a tiny, unassuming lowercase ‘s’. Next to it sat an equally small ‘w’, ‘f’, and ‘a’. They looked tired.

"So," she said softly, "if they write a song about me? Like, 'Summer Nights'?"

Summer gasped. "But... what about poetry? What about personification?"

Spring brings blooming flowers.