Oops, it doesn't look like 'world war ii museuma day' is a national day..

Other days

bubble bath

Bubble Bath Day
get funky

Get Funky Day
ruby

Ruby Day
singles

Singles Day
buddy

Buddy Day
youth

Youth Day
bow tie

Bow Tie Day
azonto is acceptable

Azonto Is Acceptable Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
lash

Lash Day