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

Other days

boy friend

Boy Friend Day
lost sock memorial

Lost Sock Memorial Day
embarrass your best friend

Embarrass Your Best Friend Day
prosecco

Prosecco Day
bonang

Bonang Day
boyfriend

Boyfriend Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
bounce

Bounce Day
ask out your crush

Ask Out Your Crush Day
my little pony

My Little Pony Day