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

Other days

artists

Artists Day
youth

Youth Day
bow tie

Bow Tie Day
coffee

Coffee Day
fiancee

Fiancee Day
tell a fairytale

Tell A Fairytale Day
hoodie

Hoodie Day
brow

Brow Day
aloxolt

Aloxolt Day
lisp

Lisp Day