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

Other days

boba

Boba Day
ponytail

Ponytail Day
polyamory

Polyamory Day
reading

Reading Day
my little pony

My Little Pony Day
youth

Youth Day
kiss a ginger

Kiss A Ginger Day
stud

Stud Day
get funky

Get Funky Day
mean girls

Mean Girls Day