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

Other days

ruby

Ruby Day
pick me

Pick Me Day
lost sock memorial

Lost Sock Memorial Day
unicorn

Unicorn Day
pumpkin

Pumpkin Day
artists

Artists Day
tell a fairytale

Tell A Fairytale Day
youth

Youth Day
lumpy rug

Lumpy Rug Day
buddy

Buddy Day