Oops, it doesn't look like 'excuse for people to smoke weed in the middle of the day' is a national day..

Other days

Fiancee Day

Get Funky Day

Youth Day

Prescription Drug Take Back Day

Lash Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Lumpy Rug Day

Ask Out Your Crush Day

Frozen Yogurt Day

Tulip Day