World Laughter Day takes place on the first Sunday of May of every year . The first celebration was on January 10, 1998, in Mumbai, India, and was arranged by Dr. Madan Kataria, founder of the worldwide Laughter Yoga movement. Laughter Yoga says: Laughter is a positive and powerful emotion that has all the ingredients required for individuals to change themselves and to change the world in a peaceful and positive way. The day is now celebrated worldwide