Oops, it doesn't look like 'gallery in athens day' is a national day..

Other days

book

Book Day
coffee

Coffee Day
boba

Boba Day
stud

Stud Day
ride the wind

Ride The Wind Day
lumpy rug

Lumpy Rug Day
nail polish

Nail Polish Day
ormille

Ormille Day
girl friend

Girl Friend Day
one

One Day