Oops, it doesn't look like 'hug a tree love a tree day' is a national day..

Other days

brow

Brow Day
girl friend

Girl Friend Day
carpenters

Carpenters Day
martini

Martini Day
boba

Boba Day
ruby

Ruby Day
polyamory

Polyamory Day
aloxolt

Aloxolt Day
lash

Lash Day
bow tie

Bow Tie Day