Oops, it doesn't look like 'champions won day' is a national day..

Other days

unicorn

Unicorn Day
kale

Kale Day
coffee

Coffee Day
gum

Gum Day
first love

First Love Day
bubble bath

Bubble Bath Day
martini

Martini Day
aloxolt

Aloxolt Day
tell a fairytale

Tell A Fairytale Day
cuddle up

Cuddle Up Day