National Opposite Day is an informal holiday celebrated on January 25th each year. On this day, people are encouraged to say and do the opposite of what they mean. For example, if someone says "I love broccoli," they might actually dislike it. The day is often used for fun and playful interactions among friends and family. While National Opposite Day is not an official holiday, it has gained popularity through social media and children's literature. It is often associated with the character Dr. Seuss and his whimsical stories, which inspire creativity and imagination in celebrating opposites.