Oops, it doesn't look like 'guard are back outside city hall in philadelphia after pulling back out of sight for election day' is a national day..

Other days

Polyamory Day

Pick Me Day

Self Appreciation Day

Appreciate Yaself A Lil Extra Day

Brow Day

Embarrass Your Best Friend Day

Donate Your Hair Day

Lost Sock Memorial Day

My Little Pony Day

Ponytail Day