Oops, it doesn't look like 'gun cleaning day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boba

Boba Day
boy friend

Boy Friend Day
hiv awareness

Hiv Awareness Day
self appreciation

Self Appreciation Day
lisp

Lisp Day
my little pony

My Little Pony Day
hot chocolate

Hot Chocolate Day
ride the wind

Ride The Wind Day
kale

Kale Day