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

Other days

lumpy rug

Lumpy Rug Day
gum

Gum Day
eat what you want

Eat What You Want Day
brow

Brow Day
book

Book Day
special education

Special Education Day
law

Law Day
boy friend

Boy Friend Day
my little pony

My Little Pony Day
youth

Youth Day