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

Other days

ponytail

Ponytail Day
bonang

Bonang Day
latina equal pay

Latina Equal Pay Day
one

One Day
gum

Gum Day
stud

Stud Day
tulip

Tulip Day
cursing

Cursing Day
nae nae

Nae Nae Day
lash

Lash Day