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

Other days

kiss a ginger

Kiss A Ginger Day
kale

Kale Day
coffee

Coffee Day
stud

Stud Day
cat girl

Cat Girl Day
girl friend

Girl Friend Day
my little pony

My Little Pony Day
reading

Reading Day
bonang

Bonang Day
one

One Day