Oops, it doesn't look like 'Chem Trails day' is a national day..

Other days

boy friend

Boy Friend Day
coffee

Coffee Day
polyamory

Polyamory Day
pick me

Pick Me Day
cat girl

Cat Girl Day
believe

Believe Day
kale

Kale Day
girl friend

Girl Friend Day
gum

Gum Day
self appreciation

Self Appreciation Day