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

Other days

gum

Gum Day
ormille

Ormille Day
youth

Youth Day
healing

Healing Day
bow tie

Bow Tie Day
ride the wind

Ride The Wind Day
gallery

Gallery Day
ruby

Ruby Day
fiancee

Fiancee Day
martini

Martini Day