National Simplicity Day is celebrated on July 12 each year in honor of the birthday of Henry David Thoreau, an American author and philosopher known for his advocacy of simple living. The day encourages individuals to reflect on their lives and consider ways to simplify their routines, possessions, and commitments. The observance promotes the idea that a simpler lifestyle can lead to greater happiness and fulfillment. People are encouraged to declutter their homes, reduce distractions, and focus on what truly matters, fostering a sense of peace and mindfulness in their daily lives.