When is World No Tobacco Day observed?

When is World No Tobacco Day observed?

تمباکو کا عالمی دن کب منایا جاتا ہے؟
Explanation

World No Tobacco Day is observed on 31 May every year.

Theme for 2022 is Tobacco:A threat to our environment 

Theme 2023: We want food, not tobacco 

Theme 2024: Protecting children from tobacco industry interference