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

Other days

one

One Day
cursing

Cursing Day
believe

Believe Day
carpenters

Carpenters Day
lash

Lash Day
blanket fort

Blanket Fort Day
self care

Self Care Day
fiancee

Fiancee Day
artists

Artists Day
azonto is acceptable

Azonto Is Acceptable Day