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

Other days

brow

Brow Day
ormille

Ormille Day
bow tie

Bow Tie Day
ruby

Ruby Day
prosecco

Prosecco Day
get funky

Get Funky Day
one

One Day
china

China Day
ride the wind

Ride The Wind Day
my little pony

My Little Pony Day