Oops, it doesn't look like 'thanks for reminding us we are all single day' is a national day..

Other days

Me Day

Gum Day

Promposal Day

Chocolate Milkshake Day

Tell Ur Crush You Like Them Day

Offer Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Ponytail Day

Ruby Day

Frozen Yogurt Day