Oops, it doesn't look like 'mighty eighth museum air force museum on memorial day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
hiv awareness

Hiv Awareness Day
me

Me Day
frozen yogurt

Frozen Yogurt Day
lost sock memorial

Lost Sock Memorial Day
first love

First Love Day
cursing

Cursing Day
carpenters

Carpenters Day
boba

Boba Day
unicorn

Unicorn Day