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

Other days

coffee

Coffee Day
ride the wind

Ride The Wind Day
bounce

Bounce Day
my little pony

My Little Pony Day
promposal

Promposal Day
chocolate milkshake

Chocolate Milkshake Day
self appreciation

Self Appreciation Day
kiss a brunette

Kiss A Brunette Day
ormille

Ormille Day
kiss a ginger

Kiss A Ginger Day