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

Other days

boba

Boba Day
lash

Lash Day
donate your hair

Donate Your Hair Day
fiancee

Fiancee Day
get funky

Get Funky Day
cat girl

Cat Girl Day
healing

Healing Day
cuddle up

Cuddle Up Day
lumpy rug

Lumpy Rug Day
kiss a ginger

Kiss A Ginger Day