Oops, it doesn't look like 'champion on the same day' is a national day..

Other days

self care

Self Care Day
one

One Day
stud

Stud Day
gum

Gum Day
tell a fairytale

Tell A Fairytale Day
camera

Camera Day
slime

Slime Day
self appreciation

Self Appreciation Day
reading

Reading Day
boba

Boba Day