Oops, it doesn't look like 'budget month exhibition week opens day' is a national day..

Other days

Chocolate Milkshake Day

Embarrass Your Best Friend Day

Carpenters Day

My Little Pony Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Donate Your Hair Day

Ruby Day

Cuddle Up Day

Kiss A Ginger Day

Brow Day