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

Other days

promposal

Promposal Day
latina equal pay

Latina Equal Pay Day
coffee

Coffee Day
self care

Self Care Day
law

Law Day
brow

Brow Day
camera

Camera Day
nail polish

Nail Polish Day
lisp

Lisp Day
eat what you want

Eat What You Want Day