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

Other days

frozen yogurt

Frozen Yogurt Day
cursing

Cursing Day
martini

Martini Day
one

One Day
promposal

Promposal Day
bounce

Bounce Day
blanket fort

Blanket Fort Day
first love

First Love Day
camera

Camera Day
ruby

Ruby Day