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

Other days

law

Law Day
get funky

Get Funky Day
gum

Gum Day
self appreciation

Self Appreciation Day
nae nae

Nae Nae Day
kale

Kale Day
china

China Day
lost sock memorial

Lost Sock Memorial Day
tulip

Tulip Day
comfy

Comfy Day