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

Other days

kiss a ginger

Kiss A Ginger Day
brow

Brow Day
prosecco

Prosecco Day
ruby

Ruby Day
bounce

Bounce Day
coffee

Coffee Day
blanket fort

Blanket Fort Day
polyamory

Polyamory Day
mean girls

Mean Girls Day
youth

Youth Day