Oops, it doesn't look like 'are eligible to vote but they must register day' is a national day..

Other days

Fiancee Day

Law Day

Book Day

Kiss A Brunette Day

Tell A Fairytale Day

Get Funky Day

Embarrass Your Best Friend Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Prescription Drug Take Back Day

Bow Tie Day