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

Other days

slime

Slime Day
ponytail

Ponytail Day
tell a fairytale

Tell A Fairytale Day
hoodie

Hoodie Day
self care

Self Care Day
ruby

Ruby Day
cursing

Cursing Day
get funky

Get Funky Day
nail polish

Nail Polish Day
believe

Believe Day