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

Other days

buddy

Buddy Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
singles

Singles Day
my little pony

My Little Pony Day
azonto is acceptable

Azonto Is Acceptable Day
eat what you want

Eat What You Want Day
bounce

Bounce Day
fiancee

Fiancee Day
tell a fairytale

Tell A Fairytale Day
carpenters

Carpenters Day