Oops, it doesn't look like 'eat the poopoo day' is a national day..

Other days

artists

Artists Day
chocolate milkshake

Chocolate Milkshake Day
hoodie

Hoodie Day
brow

Brow Day
fiancee

Fiancee Day
my little pony

My Little Pony Day
ruby

Ruby Day
believe

Believe Day
boba

Boba Day
martini

Martini Day