Oops, it doesn't look like 'defense issue of our day' is a national day..

Other days

boba

Boba Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
get funky

Get Funky Day
ruby

Ruby Day
bonang

Bonang Day
lisp

Lisp Day
frozen yogurt

Frozen Yogurt Day
my little pony

My Little Pony Day
lost sock memorial

Lost Sock Memorial Day
hiv awareness

Hiv Awareness Day