Oops, it doesn't look like 'champions in the small intermediate game day' is a national day..

Other days

Artists Day

Carpenters Day

Blanket Fort Day

Self Appreciation Day

Stress Awareness Day

Get Funky Day

Tell Ur Crush You Like Them Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Ormille Day

Polyamory Day