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

Other days

frozen yogurt

Frozen Yogurt Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
artists

Artists Day
camera

Camera Day
self appreciation

Self Appreciation Day
me

Me Day
singles

Singles Day
ride the wind

Ride The Wind Day
embarrass your best friend

Embarrass Your Best Friend Day
get funky

Get Funky Day