The 100 Happy Days Challenge began as a viral social media movement intended to help people focus on the positive aspects of their lives by documenting one happy moment every day. While originally a sincere wellness trend, it quickly evolved into a meme format used to satirize the difficulty of maintaining a positive outlook. These memes typically contrast the high energy and optimism of the first few days with the eventual exhaustion or mundane reality of trying to find joy in everyday life. It has become a relatable way to poke fun at performative happiness and the struggle of completing long-term internet challenges.