If you are writing a title (for a blog post, an essay, or an email subject line), standard Title Case rules dictate that you capitalize the principal words. In this context, "Autumn" becomes a proper noun simply because of where it sits.
If the word "autumn" is part of a specific name, title, or event, it becomes a proper noun. does autumn need a capital letter
There is one final trick that confuses many people: If you are writing a title (for a
✅ Autumn is my favorite season.
In ordinary writing, keep autumn lowercase unless it’s starting a sentence or part of a proper name. or an email subject line)
By following these guidelines, you'll be able to use proper capitalization when referring to the seasons in your writing.