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

Other days

youth

Youth Day
one

One Day
cat girl

Cat Girl Day
lisp

Lisp Day
aloxolt

Aloxolt Day
pick me

Pick Me Day
first love

First Love Day
pampering

Pampering Day
singles

Singles Day
promposal

Promposal Day