Oops, it doesn't look like 'to be honest day' is a national day..

Other days

cursing

Cursing Day
ponytail

Ponytail Day
law

Law Day
kiss a ginger

Kiss A Ginger Day
my little pony

My Little Pony Day
kale

Kale Day
mean girls

Mean Girls Day
stud

Stud Day
boy friend

Boy Friend Day
cuddle up

Cuddle Up Day