Oops, it doesn't look like 'sandwich best friend send me booty pics day' is a national day..

Other days

Eat What You Want Day

Nae Nae Day

Tell Ur Crush You Like Them Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Kiss A Brunette Day

Martini Day

Lash Day

Emoji Day

Buddy Day

China Day