National Knock Knock Joke Day is celebrated every October 31st, highlighting the joy and laughter brought by this simple and beloved form of humor. The day encourages people to share their favorite knock-knock jokes, fostering connections and spreading happiness. Typical customs include hosting laughter parties where friends gather to tell jokes, creating joke cards or books to share, and participating in social media challenges to showcase their best jokes. The celebration reflects the universal appeal of knock-knock jokes, which have entertained audiences of all ages for generations. This day serves as a reminder of the importance of humor in bringing people together and brightening everyday life.