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

Other days

youth

Youth Day
hoodie

Hoodie Day
aloxolt

Aloxolt Day
kale

Kale Day
nail polish

Nail Polish Day
buddy

Buddy Day
kiss a ginger

Kiss A Ginger Day
bow tie

Bow Tie Day
stress awareness

Stress Awareness Day
comfy

Comfy Day