Oops, it doesn't look like 'team win in the same day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
polyamory

Polyamory Day
nail polish

Nail Polish Day
blanket fort

Blanket Fort Day
buddy

Buddy Day
boy friend

Boy Friend Day
bow tie

Bow Tie Day
fiancee

Fiancee Day
boba

Boba Day
hiv awareness

Hiv Awareness Day