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

Other days

unicorn

Unicorn Day
cuddle up

Cuddle Up Day
one

One Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
martini

Martini Day
blanket fort

Blanket Fort Day
polyamory

Polyamory Day
bow tie

Bow Tie Day
donate your hair

Donate Your Hair Day
eat what you want

Eat What You Want Day