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

Other days

eat what you want

Eat What You Want Day
azonto is acceptable

Azonto Is Acceptable Day
stud

Stud Day
buddy

Buddy Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
ride the wind

Ride The Wind Day
offer

Offer Day
me

Me Day
latina equal pay

Latina Equal Pay Day
raise awerness of zeus

Raise Awerness Of Zeus Day