Oops, it doesn't look like 'championship opening round matchup of the day' is a national day..

Other days

Hoodie Day

Tell Ur Crush You Like Them Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Mean Girls Day

Nail Polish Day

Cursing Day

Ask Out Your Crush Day

Pampering Day

Embarrass Your Best Friend Day

Tulip Day