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

Other days

ruby

Ruby Day
slime

Slime Day
lumpy rug

Lumpy Rug Day
hoodie

Hoodie Day
buddy

Buddy Day
healing

Healing Day
chocolate milkshake

Chocolate Milkshake Day
artists

Artists Day
ride the wind

Ride The Wind Day
prosecco

Prosecco Day