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

Other days

Polyamory Day

China Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Pampering Day

Comfy Day

Bow Tie Day

Ask Out Your Crush Day

Appreciate Yaself A Lil Extra Day

Frozen Yogurt Day

Ride The Wind Day