Generally, you should not capitalize the names of the seasons (spring, summer, autumn/fall, winter) unless they are part of a proper noun or used in a highly specific poetic or personified context.
However, the rules change depending on whether you are following a specific style guide (like AP, Chicago, or MLA) or writing in a specific genre (like poetry).
There are four main scenarios where you should capitalize a season:
If the season is acting as a character in a story, capitalize it. If it is merely the time of year, keep it lowercase.
However, there are a few specific exceptions. This guide explains the basic rule and when to break it.
You should always capitalize a season if it is part of a proper noun—a specific name of an event, a title, or a named period.
: If the season is part of a specific event, brand, or title. "He is competing in the Summer Olympics." "I'm taking the Fall 2024 semester off."
If a season is the first word of a sentence, it must be capitalized. " Summer is my favorite time of year." B. Part of a Proper Noun