Oops, it doesn't look like 'first division match day' is a national day..

Other days

youth

Youth Day
boba

Boba Day
slime

Slime Day
kale

Kale Day
my little pony

My Little Pony Day
cat girl

Cat Girl Day
donate your hair

Donate Your Hair Day
nae nae

Nae Nae Day
one

One Day
unicorn

Unicorn Day