Oops, it doesn't look like 'team on a game day' is a national day..

Other days

law

Law Day
aloxolt

Aloxolt Day
raise awerness of zeus

Raise Awerness Of Zeus Day
artists

Artists Day
china

China Day
cuddle up

Cuddle Up Day
youth

Youth Day
ruby

Ruby Day
prosecco

Prosecco Day
unicorn

Unicorn Day