Oops, it doesn't look like 'earth booty pic day' is a national day..

Other days

hoodie

Hoodie Day
hiv awareness

Hiv Awareness Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
prescription drug take back

Prescription Drug Take Back Day
camera

Camera Day
self care

Self Care Day
self appreciation

Self Appreciation Day
brow

Brow Day
singles

Singles Day
chocolate milkshake

Chocolate Milkshake Day