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

Other days

comfy

Comfy Day

hiv awareness

Hiv Awareness Day

Emoji Day

hoodie

Hoodie Day

believe

Believe Day

embarrass your best friend

Embarrass Your Best Friend Day

boy friend

Boy Friend Day

bounce

Bounce Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

gum

Gum Day