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

Other days

buddy

Buddy Day
law

Law Day
fiancee

Fiancee Day
blanket fort

Blanket Fort Day
lisp

Lisp Day
one

One Day
hiv awareness

Hiv Awareness Day
tulip

Tulip Day
lost sock memorial

Lost Sock Memorial Day
bow tie

Bow Tie Day