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

Other days

emoji

Emoji Day
first love

First Love Day
donate your hair

Donate Your Hair Day
singles

Singles Day
nail polish

Nail Polish Day
bow tie

Bow Tie Day
hoodie

Hoodie Day
self care

Self Care Day
cuddle up

Cuddle Up Day
stud

Stud Day