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

Other days

lisp

Lisp Day
gum

Gum Day
my little pony

My Little Pony Day
blanket fort

Blanket Fort Day
carpenters

Carpenters Day
cuddle up

Cuddle Up Day
me

Me Day
bubble bath

Bubble Bath Day
fiancee

Fiancee Day
ruby

Ruby Day