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

Other days

fiancee

Fiancee Day
cat girl

Cat Girl Day
my little pony

My Little Pony Day
get funky

Get Funky Day
ruby

Ruby Day
lisp

Lisp Day
pick me

Pick Me Day
healing

Healing Day
buddy

Buddy Day
youth

Youth Day