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

Other days

lumpy rug

Lumpy Rug Day
blanket fort

Blanket Fort Day
hiv awareness

Hiv Awareness Day
bow tie

Bow Tie Day
one

One Day
buddy

Buddy Day
believe

Believe Day
slime

Slime Day
youth

Youth Day
comfy

Comfy Day