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

Other days

coffee

Coffee Day
reading

Reading Day
donate your hair

Donate Your Hair Day
tulip

Tulip Day
bow tie

Bow Tie Day
gum

Gum Day
hoodie

Hoodie Day
cuddle up

Cuddle Up Day
nae nae

Nae Nae Day
ormille

Ormille Day