Oops, it doesn't look like 'concet day' is a national day..

Other days

ask out your crush

Ask Out Your Crush Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
frozen yogurt

Frozen Yogurt Day
gum

Gum Day
law

Law Day
buddy

Buddy Day
eat what you want

Eat What You Want Day
raise awerness of zeus

Raise Awerness Of Zeus Day
believe

Believe Day
stress awareness

Stress Awareness Day