Oops, it doesn't look like 'check to see where your string vest is day' is a national day..

Other days

offer

Offer Day
hot chocolate

Hot Chocolate Day
buddy

Buddy Day
lisp

Lisp Day
hoodie

Hoodie Day
azonto is acceptable

Azonto Is Acceptable Day
latina equal pay

Latina Equal Pay Day
chocolate milkshake

Chocolate Milkshake Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
bow tie

Bow Tie Day