Oops, it doesn't look like 'monument on public lands day' is a national day..

Other days

one

One Day
hoodie

Hoodie Day
bow tie

Bow Tie Day
ride the wind

Ride The Wind Day
ruby

Ruby Day
singles

Singles Day
tell a fairytale

Tell A Fairytale Day
me

Me Day
bounce

Bounce Day
aloxolt

Aloxolt Day