Oops, it doesn't look like 'champion babyyyy day' is a national day..

Other days

nae nae

Nae Nae Day
cursing

Cursing Day
artists

Artists Day
gum

Gum Day
law

Law Day
kiss a ginger

Kiss A Ginger Day
carpenters

Carpenters Day
self appreciation

Self Appreciation Day
tulip

Tulip Day
martini

Martini Day