World Hand Hygiene Day is observed on_____________? September 18, 2021September 18, 2021 administrator World Hand Hygiene Day is observed on_____________?38473Well Done. Your Answer is Correct Keep it Up!381083737737012 Share this:FacebookXLike this:Like Loading...Related Posts:International Day of the Midwife is observed…Coal Miners’ Day is observed on_____________?International Firefighters’ Day is observed on_____________?Which day is observed as the World Pneumonia Day annually?World Science Day for Peace and Development is…World Laughter Day is observed on_______________?