Stories aren’t seasonal, even if they are.
My story may take place on Halloween but it’s not a Halloween story. It’s a story about a boy facing terrifying odds, friendship, courage, and a little magic thrown in. He could be going home after the neighborhood baseball game and heading to the celebratory party at Mackenzie’s. He can still be kidnapped by Uncle Doug and his friends can still encounter the Koi.
Movies like Trick ‘r Treat are specifically designed to have Halloween as an integral piece of the plot. In the movie townspeople have to follow the traditions of Halloween or they die horribly. That is one of the major differences between a story like that and my own. My story isn’t season specific.
It can happen at any time and while I do put immeasurable amounts of Halloween in there, you the reader, can decide which season or time or event it can take place.