Oops, it doesn't look like 'dinah throws balls day' is a national day..

Other days

offer

Offer Day
my little pony

My Little Pony Day
boy friend

Boy Friend Day
lumpy rug

Lumpy Rug Day
lash

Lash Day
believe

Believe Day
coffee

Coffee Day
book

Book Day
gum

Gum Day
comfy

Comfy Day