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

Other days

blanket fort

Blanket Fort Day
promposal

Promposal Day
lost sock memorial

Lost Sock Memorial Day
law

Law Day
boy friend

Boy Friend Day
one

One Day
bow tie

Bow Tie Day
eat what you want

Eat What You Want Day
lisp

Lisp Day
brow

Brow Day