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

Other days

prosecco

Prosecco Day
gum

Gum Day
ride the wind

Ride The Wind Day
self care

Self Care Day
camera

Camera Day
youth

Youth Day
coffee

Coffee Day
ponytail

Ponytail Day
bounce

Bounce Day
hiv awareness

Hiv Awareness Day