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

Other days

ponytail

Ponytail Day
lisp

Lisp Day
kiss a brunette

Kiss A Brunette Day
boba

Boba Day
ask out your crush

Ask Out Your Crush Day
kale

Kale Day
get funky

Get Funky Day
cursing

Cursing Day
boy friend

Boy Friend Day
buddy

Buddy Day