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

Other days

hoodie

Hoodie Day
ponytail

Ponytail Day
frozen yogurt

Frozen Yogurt Day
tulip

Tulip Day
lumpy rug

Lumpy Rug Day
bow tie

Bow Tie Day
ride the wind

Ride The Wind Day
healing

Healing Day
one

One Day
lash

Lash Day