Oops, it doesn't look like 'watch mean girls day' is a national day..

Other days

hoodie

Hoodie Day
first love

First Love Day
get funky

Get Funky Day
self appreciation

Self Appreciation Day
ride the wind

Ride The Wind Day
one

One Day
ruby

Ruby Day
aloxolt

Aloxolt Day
china

China Day
tulip

Tulip Day