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

Other days

ruby

Ruby Day
nail polish

Nail Polish Day
mean girls

Mean Girls Day
bow tie

Bow Tie Day
ask out your crush

Ask Out Your Crush Day
stress awareness

Stress Awareness Day
one

One Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
buddy

Buddy Day
my little pony

My Little Pony Day