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

Other days

ponytail

Ponytail Day
unicorn

Unicorn Day
bow tie

Bow Tie Day
nae nae

Nae Nae Day
lumpy rug

Lumpy Rug Day
tulip

Tulip Day
cuddle up

Cuddle Up Day
donate your hair

Donate Your Hair Day
nail polish

Nail Polish Day
carpenters

Carpenters Day