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

Other days

ormille

Ormille Day
boy friend

Boy Friend Day
china

China Day
bow tie

Bow Tie Day
carpenters

Carpenters Day
blanket fort

Blanket Fort Day
kale

Kale Day
azonto is acceptable

Azonto Is Acceptable Day
ride the wind

Ride The Wind Day
bubble bath

Bubble Bath Day