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

Other days

blanket fort

Blanket Fort Day
kiss a brunette

Kiss A Brunette Day
unicorn

Unicorn Day
healing

Healing Day
boyfriend

Boyfriend Day
ormille

Ormille Day
bow tie

Bow Tie Day
aloxolt

Aloxolt Day
hannah

Hannah Day
believe

Believe Day