Oops, it doesn't look like 'facepalm meme stockpile will be exhausted by memorial day' is a national day..

Other days

Bounce Day

Kiss A Brunette Day

Frozen Yogurt Day

Gallery Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Bubble Bath Day

Singles Day

Polyamory Day

Nae Nae Day

Martini Day