Oops, it doesn't look like 'gallery of australia day' is a national day..

Other days

Gum Day

Appreciate Yaself A Lil Extra Day

My Little Pony Day

Ponytail Day

Fiancee Day

Pumpkin Day

Pampering Day

Nail Polish Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Carpenters Day