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

Other days

gallery

Gallery Day
slime

Slime Day
cat girl

Cat Girl Day
reading

Reading Day
tell a fairytale

Tell A Fairytale Day
blanket fort

Blanket Fort Day
cursing

Cursing Day
ormille

Ormille Day
self care

Self Care Day
ride the wind

Ride The Wind Day