Oops, it doesn't look like 'burn the burka day' is a national day..

Other days

carpenters

Carpenters Day
polyamory

Polyamory Day
blanket fort

Blanket Fort Day
ruby

Ruby Day
gum

Gum Day
ormille

Ormille Day
slime

Slime Day
lisp

Lisp Day
special education

Special Education Day
comfy

Comfy Day