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

Other days

pumpkin

Pumpkin Day
kale

Kale Day
fiancee

Fiancee Day
blanket fort

Blanket Fort Day
my little pony

My Little Pony Day
comfy

Comfy Day
bow tie

Bow Tie Day
gum

Gum Day
boba

Boba Day
singles

Singles Day