Oops, it doesn't look like 'intelligence in the same day' is a national day..

Other days

ponytail

Ponytail Day
appreciate yaself a lil extra

Appreciate Yaself A Lil Extra Day
blanket fort

Blanket Fort Day
comfy

Comfy Day
self appreciation

Self Appreciation Day
kale

Kale Day
nail polish

Nail Polish Day
kiss a ginger

Kiss A Ginger Day
kiss a brunette

Kiss A Brunette Day
me

Me Day