Oops, it doesn't look like 'blake shelton appreciation day' is a national day..

Other days

tulip

Tulip Day
bounce

Bounce Day
polyamory

Polyamory Day
azonto is acceptable

Azonto Is Acceptable Day
buddy

Buddy Day
self appreciation

Self Appreciation Day
kiss a ginger

Kiss A Ginger Day
singles

Singles Day
cuddle up

Cuddle Up Day
hiv awareness

Hiv Awareness Day