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

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
one

One Day
blanket fort

Blanket Fort Day
ruby

Ruby Day
my little pony

My Little Pony Day
embarrass your best friend

Embarrass Your Best Friend Day
get funky

Get Funky Day
kiss a ginger

Kiss A Ginger Day
hiv awareness

Hiv Awareness Day
self appreciation

Self Appreciation Day