Prime Number Magazine runs a monthly 53-Word Story Contest, open to writers of any age from around the world.
Each story can only be exactly 53 words in length, and must be based on the monthly theme. The winner has their story published in Prime Number Magazine and receives a free book.
The competition opens on the first day of each month, and closes on the 15th of each month.
Find out more and enter here: https://www.press53.com/53word-story-contest