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

Other days

unicorn

Unicorn Day
one

One Day
boy friend

Boy Friend Day
blanket fort

Blanket Fort Day
cuddle up

Cuddle Up Day
me

Me Day
my little pony

My Little Pony Day
girl friend

Girl Friend Day
offer

Offer Day
bow tie

Bow Tie Day