Oops, it doesn't look like 'champ in one day' is a national day..

Other days

reading

Reading Day
one

One Day
ormille

Ormille Day
hoodie

Hoodie Day
kiss a brunette

Kiss A Brunette Day
stress awareness

Stress Awareness Day
unicorn

Unicorn Day
stud

Stud Day
carpenters

Carpenters Day
lumpy rug

Lumpy Rug Day