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

Other days

gallery

Gallery Day
believe

Believe Day
first love

First Love Day
bow tie

Bow Tie Day
youth

Youth Day
slime

Slime Day
get funky

Get Funky Day
tell a fairytale

Tell A Fairytale Day
nae nae

Nae Nae Day
bubble bath

Bubble Bath Day