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

Other days

stud

Stud Day
fiancee

Fiancee Day
ruby

Ruby Day
ponytail

Ponytail Day
promposal

Promposal Day
emoji

Emoji Day
bow tie

Bow Tie Day
tell a fairytale

Tell A Fairytale Day
donate your hair

Donate Your Hair Day
artists

Artists Day