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

Other days

hiv awareness

Hiv Awareness Day
slime

Slime Day
comfy

Comfy Day
bow tie

Bow Tie Day
brow

Brow Day
ponytail

Ponytail Day
self care

Self Care Day
bounce

Bounce Day
buddy

Buddy Day
kale

Kale Day