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

Other days

comfy

Comfy Day
prosecco

Prosecco Day
one

One Day
boy friend

Boy Friend Day
tell a fairytale

Tell A Fairytale Day
bonang

Bonang Day
healing

Healing Day
self care

Self Care Day
gum

Gum Day
ormille

Ormille Day