World Laughter Day is observed on_______________? September 18, 2021September 18, 2021 administrator World Laughter Day is observed on_______________?37377Well Done. Your Answer is Correct Keep it Up!381083701237742 Share this:FacebookXLike this:Like Loading...Related Posts:World Press Freedom Day is observed on_______________?World Tuna Day is observed on_______________.Which day is observed as the World Pneumonia Day annually?World Science Day for Peace and Development is…World Hand Hygiene Day is observed on_____________?World Diabetes Day is observed on ___________ every year.