Oops, it doesn't look like 'girlfriendboyfriendbest friend or sister day' is a national day..

Other days

Promposal Day

Camera Day

Hot Chocolate Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Embarrass Your Best Friend Day

Donate Your Hair Day

Nae Nae Day

Bonang Day

Lash Day

Get Funky Day