Oops, it doesn't look like 'My Best Friend Turned Out To Be Fake day' is a national day..

Other days

ask out your crush

Ask Out Your Crush Day
ruby

Ruby Day
azonto is acceptable

Azonto Is Acceptable Day
stud

Stud Day
lost sock memorial

Lost Sock Memorial Day
embarrass your best friend

Embarrass Your Best Friend Day
brow

Brow Day
bubble bath

Bubble Bath Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
chocolate milkshake

Chocolate Milkshake Day