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

Other days

ask out your crush

Ask Out Your Crush Day
bow tie

Bow Tie Day
my little pony

My Little Pony Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
azonto is acceptable

Azonto Is Acceptable Day
kiss a ginger

Kiss A Ginger Day
healing

Healing Day
ruby

Ruby Day
hannah

Hannah Day
kiss a brunette

Kiss A Brunette Day