Oops, it doesn't look like 'vagoyster day' is a national day..

Other days

kiss a brunette

Kiss A Brunette Day
one

One Day
ruby

Ruby Day
bow tie

Bow Tie Day
lumpy rug

Lumpy Rug Day
nae nae

Nae Nae Day
mean girls

Mean Girls Day
gallery

Gallery Day
healing

Healing Day
book

Book Day