Oops, it doesn't look like 'songs on the eve of day' is a national day..

Other days

gallery

Gallery Day
kale

Kale Day
nae nae

Nae Nae Day
cuddle up

Cuddle Up Day
girl friend

Girl Friend Day
ruby

Ruby Day
ormille

Ormille Day
boba

Boba Day
cat girl

Cat Girl Day
fiancee

Fiancee Day